Sticky Dolphin

The act of inserting the brush end of the toothbrush up your own asshole and then proceeding to brush your teeth with it. This can also be done to others as a form of punishment with another person putting the toothbrush in while the taker must brush with it after.

Steven: "What I did wasn't even that bad"
Devon: "Bro you gave yourself a sticky dolphin, IT'S THAT BAD"