A word used to indicate you have failed at whatever you were trying to do. Sometimes is another word for "Piles". Can also be used as an insult.
Some Bully: Oi, mate, your hair looks like a festering turd!
Bullies Victim: Oh yeah? Well you're an Anus-Berry!
Juggler: *After dropping the juggling balls* Aw man, that was total Anus-Berries.