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1.
Potwash - someone/something that is useless, pointless. Derived from the job 'potwash' in which someone who works in a pub/restaurant and only 'washes the pots'.

Calling someone or something a potwash could mean they are stupid, useless, meaningless, pointless, dumb, worthless etc.

The word originated at Chichester University, West Sussex, United Kingdom, December 2012
1. *someone breaks something
'Oh my you are such a potwash Soph!'

2. *someone does a job/task wrong
'Chris you're nothing but a potwash!'

3. 'That lesson was so pointless'

'Yeah, it was absolute potwash!'

4. 'You're an idiot!'

'Dumbass!'

'Potwash!'
by SwitIsTheWord December 06, 2012