Refers to the act of attacking an opponents legs with one's teeth.
A phrase coined by Max Brooks, in his work World War Z, and itself a homage to Monty Python and the Holy Grail.
Arthur: Come, Patsy.
Black Knight: Oh, oh, I see, running away then. You yellow bastard! Come back here and take what's coming to you. I'll bite your legs off!
White Knight: No sir, I won´t let you...
Black Knight: Fuck you, I will kick you too!