ガチンコ勝しょう負ぶ

noun

head-on fight; serious contest

Colloquial term for a no-holds-barred, all-out confrontation or competition where both sides give everything they have.

• 今こん夜やはガチンコ勝しょう負ぶで決けっ着ちゃくをつけよう。

  Let's settle this tonight with a head-on fight.

• あの二人ふたりの議ぎ論ろんはいつもガチンコ勝しょう負ぶだ。

  Those two always have serious, no-holds-barred debates.