noun
guaranteed punish; guaranteed counter-attack
Video game term for a counter-attack that is guaranteed to hit after blocking or evading an opponent's unsafe move.
この技をガードしたら確定反撃が入る。
If you block this move, you can get a guaranteed punish.
確定反撃を覚えると勝率が上がる。
Learning guaranteed punishes will improve your win rate.
Compound of 確定 (definite, confirmed) and 反撃 (counter-attack). A modern video game term, likely coined within the fighting game community.