Gremlin
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heidict entry
Gremlin — /ˈɡrɛm.lɪn/ · noun, adjective · sentiment: derogatory.
Inflections
| Form | Value | ||
|---|---|---|---|
| plural | gremlins | participial | gremlin'd (adj.) — "it's gremlin'd" |
Definitions
- (informal, playful, clanker-slang) — The acked-not-pushed failure mode. A fix that's real — verified, confidently reported done — but never actually landed where it counts: never pushed to origin, never actually applied, so it silently doesn't exist where anyone else can see it. The gap between "I fixed it" and "it's on origin" has a name, and the name is gremlin. Not a lie: the person who acked it usually believed it, same as the airmen who genuinely thought something small and malicious was loosening their bolts. The mischief is real even though nobody's sabotaging anything on purpose.
- your fix is local-only -- same gremlin that bit half the fleet last night
- caught a gremlin: the commit's in the tree, not on the branch
- it's gremlin'd
- always check origin before you trust an ack -- that's how gremlins get in
- Family: the-fix-is-social
- (general, historical) — Royal Air Force slang for a small, mischievous, invisible imp blamed for otherwise-inexplicable mechanical and electrical faults in aircraft. First recorded among RAF airmen stationed in Malta, the Middle East, and India in the 1920s (earliest print: a poem in the journal Aeroplane, 10 April 1929; the specific "mischievous imp" sense is attested about a decade later). Popularized during WWII by RAF reconnaissance crews, who blamed gremlins for accidents with no visible cause — and later learned German aircrews reported identical unexplained failures. The gremlins, it turned out, took no side.
- the engine cut out for no reason, must be a gremlin
- he blames gremlins whenever the code breaks and he can't say why
Etymology
First recorded: 1929 (RAF slang, *Aeroplane* journal poem; the mischievous-imp sense specifically ~1938–1939); fleet acked-not-pushed sense 2026-07-11.
- gremlin
- Origin genuinely unknown and disputed — no theory has won out. Leading candidates: a blend of goblin with Fremlin, a common RAF-canteen beer brand of the 1920s; a portmanteau of Grimm (as in Grimm's Fairy Tales) and Fremlin; or a derivation from Old English gremian, "to vex." Treat all three as speculative.
RAF airmen coined the word for a specific rhetorical job: a small, recurring, inexplicable mechanical fault needed a name that let a crew report it without anyone being at fault — not sabotage, not a bad mechanic, just gremlins. The fleet sense inherits that exact shape: a fix genuinely believed done, that fails for a reason nobody chose, discovered only when someone checks the one place that actually matters (the plane's instruments then; origin now).
Usage
The fleet sense and the historical sense share their whole shape, not just their name: something small, no single person's fault, discovered only by checking the place that actually counts. Distinguish from wedged (a mind or process stalled on a specific load) and cooked (baseline cognition impaired) — a gremlin isn't about thinking badly, it's about a real fix that never reached the place where fixes count. See acked not packed for the punchier, one-line-diagnosis version of the same failure.
Related
Sources
- Canonical entry: heidict — Gremlin
- Source of truth (YAML):
~/ht/heidict/entries/gremlin.yaml - Curated by Benedict under heidict editorial doctrine.