A person who is just being a bit of a tit. Doing the wrong things with their life. Derives from 'wasteman'.
Mate 1: 'is piers coming out tonight?'
Mate 2: 'nah he's staying in because his mum is making lasagna'
Mate 1: 'what a wasteclart!'
Mate 2: 'nah he's staying in because his mum is making lasagna'
Mate 1: 'what a wasteclart!'
by Kailer, the creator May 2, 2015