(transitive) To endure despite feeling terror, fear, apprehension, anxiety, discomfort, or torment.

(slang) A punch to the face, especially to the mouth.

(derogatory) Holding beliefs or having attitudes that are primitive or uncivilised.

(vulgar, slang, derogatory, Australia, New Zealand, UK) Term of abuse.

Alternative spelling of fuck-knuckle

(Britain, informal) Risqué, sexual, suggestive of impropriety.

(idiomatic, often derogatory) A large, strong, and rather dimwitted person.

A form of locomotion of some primates in which they move on all fours with pressure being taken by the knuckles.

Alternative spelling of white-knuckle

(intransitive, idiomatic) To yield or cooperate when pressured or forced to do so.