"cruft" means: Anything that is old or of inferior quality.. This is informal slang, common in casual speech, texting and social media, but not appropriate for school work, applications or professional settings. There is no real cause for concern in itself; it is everyday peer vocabulary. If your child uses it, a light comment about audience and register is usually enough — no need to escalate. Context, more than the word, tells you whether to follow up.
cruft
(slang) Anything that is old or of inferior quality.
kɹʌftDocumented since 1950s1950sBoomerhistoricalCurrent130 viewsLast reviewed Jun 29, 2026＋ Add a definition
Etymology timeline
Born ~1959 · 1 year of recorded use20th centurySee decade cohort →
Definitions
#1·Apr 27, 2026
(slang) Anything that is old or of inferior quality.
Students “still think of privacy as ‘the one secret I don’t want revealed,’ and that’s not the problem. Their problem is all the stuff that’s the cruft, the data dandruff, of life, that they don’t think of as secret in any way, but which…
Origin: Circa 1959, MIT Tech Model Railroad Club. origin; possibly from Cruft Hall, built in 1915 as a gift from a donor named Harriet Otis Cruft. Cruft Hall was the radar laboratory of Harvard's physics department during the Second World War, which contained much old and unused technical equipment. Possibly , both of which may form on old abandoned things, or influenced by crud. Origin information sourced from Wiktionary contributors (CC BY-SA 4.0).
For parents
"cruft" means: Anything that is old or of inferior quality.. This is informal slang, common in casual speech, texting and social media, but not appropriate for school work, applications or professional settings. There is no real cause for concern in itself; it is everyday peer vocabulary. If your child uses it, a light comment about audience and register is usually enough — no need to escalate. Context, more than the word, tells you whether to follow up.
For ESL learners
"cruft" means: Anything that is old or of inferior quality.. Register: informal slang, fine in casual conversation, texting and social media but not in academic essays, business writing or formal speech. A common non-native mistake is to use the word in the wrong register, or to assume one fixed meaning when it is actually polysemous; always check the surrounding register and the audience before producing it yourself. In formal writing, prefer a neutral synonym or a short descriptive phrase, and use this word only when you have heard or read it being used naturally in a comparable context.
Was this helpful?
Comments
#2·Apr 27, 2026
(film, slang) Meaningless or gratuitous content displayed on computer consoles in visual entertainment productions.
The PEB includes the list of loaded modules (i.e., the EXE and DLLs), the memory containing environment strings, the current working directory, and data for managing the process’ heaps—as well as lots of special-case Win32 cruft that has…
Was this helpful?
Comments
#3·Apr 27, 2026
(computing, slang) Redundant, old or improperly written code, especially that which accumulates over time.
See it in action
“What I've seen of AP suggests that there ought be a bunch of hyperlight and VERY SMALL variations of D&D 5e around to serve what they really need (and being praised for cutting the cruft), but that's not at all the case, and I feel like I'm missing something.”
The document just goes on at length in the same way, picking out the sort of cruft that’s been littering Trump’s Twitter feed since Nov. 3 and tying it all into one stinky package. It’s sincerely not worth running through the entire lita…
Heard in the wild
“What I've seen of AP suggests that there ought be a bunch of hyperlight and VERY SMALL variations of D&D 5e around to serve what they really need (and being praised for cutting the cruft), but that's not at all the case, and I feel like I'm missing something.”
— Bluesky· May 2026
Was this helpful?
Comments
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.
Have a better definition?
Add your own interpretation of "cruft".
⚡About Tech, Dev & AI slang
The vocabulary of software engineers, AI researchers, and anyone living in a terminal or on GitHub — from LLM to MCP, CORS to vibe coding, agentic to enshittification.
See all Tech, Dev & AI slang on Slangora.
Tags
Other words near "cruft" (C)
cruffin energycruffin failcruffin maxxingcruffin modecruffin pilledcruffin szncruftinesscruftwarecrugCruise Elroycruisercruiserweight
Browse all slang words starting with C.