flying moose knuckle Share definition Flag its when a obeast bitch skydives and lands on someone and they get sucked up her vag cat. OMS, did you see that guy get the flying moose knuckle? can he breathe? whered he go? flying moose knuckle by MegaMarthaTheFlyinMooseKnuckle August 9, 2009 0 0 Get merch Get the flying moose knuckle mug. Buy Now — $32.95 See more merch