Fill in means: To fill; to replace material that is absent or has been removed.. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. As a place or proper-name reference it is purely descriptive. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.
fill in
(transitive) To fill; to replace material that is absent or has been removed.
Seen in the wild
10 citations · last seen May 2026
Seen in the wild
BlueskyMay 2026
📣 Submitting your abstracts 📋 to participate in #iMarCo26 is very easy! 😎 Go to 👉 https://imarco2026.es/communications and fill in the form. Quick and simple! 🤓 📆 Deadline: May 15th! @uvigo.bsky.social #IIM_C…
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BlueskyMay 2026
Fill in the blanks: “I ____ your c*ck, and then we ____.” #OnlyFansModel #OnlyFansPromo #NSFW #bigtits #linkinbio
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BlueskyMay 2026
And a con, and a manipulator, and a grifter, and a ______ fill in the blank.
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BlueskyMay 2026
"A General Framework for Incorporating Ethical Reasoning into Mathematical Modeling Problems" by Alayont, Burke, Griesenhauer, Shaw & Thomas about a modifying tasks to help students to fill in the missing ethical reas…
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BlueskyMay 2026
Find a stock photo/ reference and “trace” over the main features, and fill in the details yourself.
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Definitions
UK
#1·Apr 27, 2026UK
(transitive) To fill; to replace material that is absent or has been removed.
After you're done laying the pipe, fill in the trench.
For parents
Fill in means: To fill; to replace material that is absent or has been removed.. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. As a place or proper-name reference it is purely descriptive. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.
For ESL learners
fill in means: To fill; to replace material that is absent or has been removed.. Register: neutral, standard English. A common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; native speakers immediately notice when slang appears in formal contexts, so always check the surrounding register before producing it yourself.
Heard in the wild
“📣 Submitting your abstracts 📋 to participate in #iMarCo26 is very easy! 😎 Go to 👉 https://imarco2026.es/communications and fill in the form. Quick and simple! 🤓 📆 Deadline: May 15th! @uvigo.bsky.social #IIM_CSIC #FutureOceansLab #CIM”
— Bluesky· May 2026“Fill in the blanks: “I ____ your c*ck, and then we ____.” #OnlyFansModel #OnlyFansPromo #NSFW #bigtits #linkinbio”
— Bluesky· May 2026“And a con, and a manipulator, and a grifter, and a ______ fill in the blank.”
— Bluesky· May 2026“Marco Rubio to fill in for Karoline Leavitt as White House Press Secretary https://www.europesays.com/people/57487/ U.S. Secretary of State and acting National Security Advisor Marco Rubio is taking on one more job on…”
— Bluesky· May 2026“I’m not clever enough to come up with the obligatory “masterbait” joke so just fill in the blanks”
— Bluesky· May 2026
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UK
#2·Apr 27, 2026UK
(transitive, idiomatic) To inform somebody, especially to supply someone missing or missed information.
If you know anything about this, maybe you can fill me in.
Heard in the wild
“"A General Framework for Incorporating Ethical Reasoning into Mathematical Modeling Problems" by Alayont, Burke, Griesenhauer, Shaw & Thomas about a modifying tasks to help students to fill in the missing ethical reasoning components. www.tandfonline.com/doi/full/10....”
— Bluesky· May 2026“Find a stock photo/ reference and “trace” over the main features, and fill in the details yourself.”
— Bluesky· May 2026“Secretary of State Marco Rubio is set to step behind the White House briefing room podium to fill in for Press Secretary Karoline Leavitt while she is on maternity leave.”
— Bluesky· May 2026“from the responses i've seen, it sounds like they've compromised on "I pick the big stories everybody sees and the algorithms can fill in the rest"”
— Bluesky· May 2026“100 ChatGPT prompts built for small business owners. Marketing. Emails. Hiring. Sales copy. Finance. Growth. Copy. Paste. Fill in the brackets. Done. Comment 'link' and I'll send it over.”
— Bluesky· May 2026
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UK
#3·Apr 27, 2026UK
(intransitive, idiomatic) To substitute for somebody or something.
He can't go on vacation very often because there is nobody to fill in for him.
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For specific readers
Why is this section here?
Slang is read by different audiences for very different reasons. The For parents view re-explains the term in plain, non-judgemental language so a caregiver can understand what their child means without needing the surrounding subculture. The For English learners view focuses on register (when it's safe to use), formal alternatives, and common mistakes — what a textbook won't teach you.
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Other words near "fill in" (F)
filing cabinetfiling clerkFilipino timeFilipinxfilletfilletedfill one's handfill one's pantsfill upfilm brofilmgoerfilmi
Browse all slang words starting with F.