another way of saying a large amount;
if said by a male, it has a dual effect by saying a large amount while giving credit to the size of his "large" penis
A male who lowers their drawers and proceeds to rotate his hips in order to project & swing his member in a motion that resembles that of a ferris wheel or helicopter. This is often done from an open window on public transportation or a trolley.
When you do something so stupid, you should just slam your palm into your crotch, to prevent procreation. Crotchpalming is usually accompanied by a facepalm of the other people around you.