Quintillion means: Either of two very large amounts.. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. 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.
quintillion
Either of two very large amounts.
Seen in the wild
BlueskyMay 2026
We're getting the same bizarre "think of the water!" concern trolling where I am -- which is ~1 mile from approximately 2 quintillion gallons of fresh water. People's brains are falling out at an alarming pace.
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BlueskyMay 2026
Since 986AD there have been over one gazillion billion trillion quintillion migrants....
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Definitions
UK
#1·Apr 27, 2026UK
Either of two very large amounts.
He had like a quintillion excuses for why he couldn't meet his obligation to me.
For parents
Quintillion means: Either of two very large amounts.. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. 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
quintillion means: Either of two very large amounts.. 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. A formal-English equivalent (a synonym or descriptive phrase) is usually safer in writing. When in doubt, paraphrase rather than reuse the slang form.
Heard in the wild
“We're getting the same bizarre "think of the water!" concern trolling where I am -- which is ~1 mile from approximately 2 quintillion gallons of fresh water. People's brains are falling out at an alarming pace.”
— Bluesky· May 2026“Since 986AD there have been over one gazillion billion trillion quintillion migrants....”
— Bluesky· May 2026
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UK
#2·Apr 27, 2026UK
(colloquial, hyperbole) An unspecified very large number.
He had like a quintillion excuses for why he couldn't meet his obligation to me.
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UK
#3·Apr 27, 2026UK
(figuratively, slang, hyperbole) Any very large number, exceeding normal description.
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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.
Used in
UK
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🇬🇧About British & Irish slang slang
UK and Irish slang — Cockney, Scouse, Geordie, Yorkshire, Glaswegian, Brummie, Welsh, West Country, plus Irish English. Centuries of regional dialects feeding into modern British and Irish street talk.
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