also: ガッツ・ポーズ
noun
triumphant pose; victory pose
A clenched-fist or arms-raised gesture of triumph, commonly used by athletes after a win or good play.
wasei-eigo (Japanese-coined English), from guts pose
彼はゴールした瞬間、ガッツポーズをとった。
He struck a triumphant pose the moment he crossed the finish line.
優勝が決まると、選手たちは
When the victory was decided, the athletes all showed victory poses at once.