Dropped Onions

Letting your nuts flop out of your boxers at someone and you surprise them with it.

Bro, Joey just dropped onions on that old lady at the bus station!

Dropping Onions

Letting your nuts flop out of your boxers at someone, and you surprise them with it.

Bro, Joey just popped his balls out, dropping onions, on that old lady at the bus station!