Answer: noogies

AnswerCrossword Clue
NOOGIESKnuckleheaded moves?
NOOGIESKnuckle-headed gestures of affection?
noogiesNOOGIE, a playful rubbing of one's knuckles on another's head
noogieslight blow or jab, usually to a person's head, back, or upper arm and accompanied by a twisting motion, with the extended knuckle of the curled-up second or third finger: done as a gesture of affection or painfully as a prank