Fack
noun, verb
noun, verb ·Rare ·Advanced level
Definitions
Noun
- 1 One of the four stomachs of a ruminating animal; rumen; paunch. UK, dialectal
Verb
- 1 Pronunciation spelling of fuck. Cockney, UK, alt-of, pronunciation-spelling, vulgar
Synonyms
All synonymsEtymology
From Middle English *fak, fec, fæc (“space, compartment”), from Old English fæc (“space of time, while, division, interval; period of five years, lustrum”), from Proto-West Germanic *fak, from Proto-Germanic *faką (“division, department, space”), from Proto-Indo-European *peh₂ǵ-, *paǵ- (“to fasten, fix”). Cognate with West Frisian fek, Dutch vak (“section, compartment”), German Fach (“compartment”), Swedish fack (“compartment, box, department”), Latin pangō (“fasten, fix”). Doublet of Fach.
Related phrases
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.