plural of moose-knuckle

(literally) to tap one's knuckles on an object such as a desk or wall to attract attention or as a signal of commmunication. / (somewhat dated, idiomatic) to give someone a punishment.

(intransitive, idiomatic) To get to work; to focus on a task. / To submit; knuckle under.

(Britain, Australia) A weapon made of metal worn around the knuckles that strengthens the impact of a punch; brass knuckles.

(idiomatic) Causing fear, excitement, apprehension, suspense, or nervousness.

(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