Night in with the lads
Metaphor for staying in on your own and beating one off.
"lads" refers to your balls.
"lads" refers to your balls.
Laurence: Mate are you coming out tonight to the pub?
Pat: Naa bud, I'm having a "night in with the lads".
Pat: Naa bud, I'm having a "night in with the lads".