when someone dips their haemorrhoids (bum grapes) into someone else's mouth, similar to the art of tea bagging. Named 'The Julius Caesar after' the great man himself and his recognised love of grapes.

When you eat dirt for the first time and leave your family to build a shack in the woods

The act of having anal sex with with your bestfriend's wife or girlfriend and immediately following ejaculation screaming Et Tu Brute!!!!!!!! Extra points if done while wearing a toga, and the "hat trick" if you do all of this on March 15 ( the ides of March). In reference to William Shakespeare's Julius Caesar.