hit one's straps

To perform at one's maximum; to begin to excel; to hit one's stride.

Japanese Meaning

全力でパフォーマンスを発揮する / 本領発揮して、順調に物事が進む / 実力を最大限に発揮し、調子に乗り始める

After months of training, the rookie finally hit one's straps during the championship match and delivered a flawless performance.

数か月のトレーニングの後、新人はついに決勝戦で本領を発揮し、完璧なプレーを見せた。

Sense（1）

To perform at one's maximum; to begin to excel; to hit one's stride.