(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.

plural of knuckle-duster

plural of knuckle duster

Alternative spelling of knuckle duster

Alternative spelling of knuckle dragger

simple past tense and past participle of knuckle down