A person with an unusually unstable head when drinking alcohol.
Look at the whiriskey head on that fella
The act of getting so drunk that you may well be mistaken for someone with learning dificulties or motor neurone disease.
Look at that pisshead, looks like he has gone full retard.
Pre-shit farting. In reference to 'Dropping the kids off at the pool(shitting)
Hey Mikey, stop beeping the horn you smelly fuck