When a person intraveniously injects meth and the rush is so intense it causes the person to instantly cough. Hense, the coughing is known as the gaff.
by MerryChrismeth April 24, 2010

when you and all your mates go to a gaff (a house party) and fuck the house up by doing weird shit like putting bananas in lights and sriracha in the knife holder
by blackcurrantsoda April 21, 2018

by Gyro man June 17, 2022

I'm going to puff a gaff
by Cosmol March 1, 2023

Primarily used by scousers(citizens of Liverpool), to describe a gathering in which friends come together to consume drugs.
by LBM123456 March 18, 2022

by fatbois March 14, 2018
