pack up your flaps - Telling someone it's time to go before you lose your temper

Telling someone it's time to go before you lose your temper completely.

Your mom said, 'Pack up your flaps, or I'm gonna make you eat your homework.'

Your teacher said, 'Pack up your flaps, or I'm gonna make you do a dance-off in the hallway.'

Your friend said, 'Pack up your flaps, or I'm gonna prank call your mom.'