"Baisse la main."
Here's a breakdown:
* Baisse: This is the imperative form of the verb "baisser" which means "to lower" or "to put down."
* la main: This means "the hand."
You could also use:
* "Abaisse ta main." ("Abaisse" is another verb meaning "to lower" or "to drop.")
* "Retire ta main." ("Retire" means "to remove" or "to take away.")
The choice of phrase would depend on the context and the level of formality. "Baisse la main" is the most neutral and commonly used phrase.