scottish youth meaning,to snog someone;kiss with tongues.
Guy one:'i want to nipp that lassie'
Guy two:'Aye,ano...shes sumbit(lol)'
A "nothing-in-particular-person"... someone who doesn't quite do anything; they're never good or bad, just there being creepy and lackluster
"I don't know why I don't like her, she's just sort of a NIPP. She didn't do anything wrong, but she doesn't do anything right either..."