To make your mates go for 'one drink' with the secret and devious intention of having many more and becoming loosely drunk before hitting the town.
Charlie: "does anyone want to go to the pub on this lovely Tuesday night?"
Frank: "yeah, but I know you are trying to get me yapped and then I'll end up frazzed"
When Miss Yapp whips out the metal detector in exams
Take that phone out your pocket or you'll get absolutely miss-yapped
He is a very fucking handsome guy and likes his cousin pig skin
I am Alex Yap, I love pig skin.