all fours
- noun
- UK
Synonyms
Card game where players score points by taking the highest card, the lowest card, the jack, or most cards
Surface Forms
Morphology
The sense 'a traditional card game' is a conventionalized name and cannot be compositionally derived from 'all' (whole) + 'four(s)' (the number/card). A B1 learner who knows the constituent words would be unlikely to infer that this specifically names a card game rather than a literal or numeric meaning, so the phrase is lexicalized and language-specific.
Etymology
All fours probably gets its name from the four ways to score in the old card game: 'high', 'low', 'jack', and 'game'. Winning those four points was called taking 'all fours', so the name reminds you of the four prizes in the game.