Akademik

feel one's oats
phrasal
1. of a horse : to act spirited or frisky
2.
a. : to be actively exuberant

the children were feeling their oats and running madly around the house

b. : to act in a newly self-confident and often self-important manner

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feel one's oats (informal)
To be lively and energetic or (esp N American) assertive
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Main Entry:oat

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I
see oat
II
informal feel lively and energetic

Useful english dictionary. 2012.