Also means
hurry up (colloquial)
Usage Note
Grouiller means to swarm or teem with something: la place grouille de touristes — the square is teeming with tourists. In colloquial or informal French, se grouiller means to hurry up or get a move on, similar to se dépêcher but more familiar. The image of swarming insects underlies both senses.
Examples
"La place grouille de monde le dimanche."
Natural Translation
The square is teeming with people on Sunday.

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