U gonna drop

To take an illegal pill

R u gonna drop tonight? ( are you going to take pills tonight)

Drop a Doughnut

To do a shit so large it takes up the circumference of the toilet bowl, turning it into the shape of a doughnut.

Do u know how to drop a Doughnut? Please plenty of fiber and vegetables

drop some mail

Tell your friends. Typically after being laid well, you brag to your crew.

When I finished her right, she went off to drop some mail and her friends wanted in.