Gaff is now commonly used with the younger generation as a slang word for 'house party'.
Someone have a decent gaff soon where we can all stay round once we're smashed.
My house ain't big enough for a gaff sorry.
When you have a party in your free house
Joe: 'I've got a free house tonight fella, gaff at mine?'
Kyle : 'Yeah sweet bro'
Gaff was originally tokened (amongst other countries with other meanings) in Newcastle Australia in the late 70's to mean "ignore".
Way to gaff me off back there mate. (translation: Thanks for ignoring me back there, friend.)
A british slang word meaning house/sesh.
Hey anything on tonight?
Yeah there's a mad gaff on down the street