This is the 984th most frequent French word.
peter
To fart.
Here, 'péter' means 'to pop' or 'to burst', describing the action of making something explode under pressure.
Il a pété le ballon en jouant.
He popped the balloon while playing.
In this context, 'péter' is used colloquially to mean 'to pass gas', referring to the release of intestinal gas.
J'ai entendu quelqu'un péter.
I heard someone pass gas.
This is an idiomatic expression where 'péter' metaphorically means 'to overstep one's boundaries' or 'to pretend to be more than one is.'