feel one's oats v. phr.,
slang 1. To feel frisky or playful; be eager and excited.
The horses were feeling their oats.
When they first got to camp, the boys were feeling their oats. 2. To act in a proud or important way.
The new gardener was feeling his oats and started to boss the other men. [TahlilGaran] English Idioms Dictionary ▲