feel one's oats

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.
Categories: feelings {slang} {v. phr.}