head-butt; head-butting
A strike delivered with the head, often in a fight or as a foul in sports.
He was sent off for head-butting an opponent in the soccer match.
喧嘩で頭突きを食らった。
I got head-butted in a fight.
Compound of 頭 (ず, 'head') and 突き (つき, 'thrust, strike'), the continuative form of 突く (つく, 'to thrust, strike').