To get extremely drunk or high, the result being utterly random and stupid (yet highly enjoyable) behaviour.
Chris: What you get up to at the weekend?
The Other Chris: Oh man we got totally dog-shaped. I still can't find my left shoe and I don't know where that hat-stand came from.
To urinate, usually from a well-used fanny.
The term is often used by Glaswegian prostitutes.
Slutty Sheila: Ken that stoopid radge backaways?
Dirty Delia: Ah kinnae listen to your shite a noo Sheila. I'm ripe for a gish so I am.