Quickone
A small one paper joint, to be smoked by no more than two people...as it wouldn't quite be worth splitting among anymore.
Hey let's get together for a quickone before that scavenger of a roommate gets back.
slip a quickone
To have sex while behind a girl in her anus. Usually at a pool party when you pull the bikini bottom to the side and "slip a quick one" (or a quicky).
"Your pool party was dope Billy, I slipped 3 quick ones on Marge!" You should go slip a quickone on your girlfriend Heather!"