champignon

/ʃɑ̃.pi.ɲɔ̃/
1.
nounmasculine

mushroom

J'ai mis un champignon dans l'omelette.

I put a mushroom in the omelet.

2.
nounmasculine

(colloquial) accelerator (pedal); used in expressions meaning 'to step on the gas'

Appuie sur le champignon, on est en retard !

Step on the gas, we're late!