What it means
A Scottish put-down for a little irritant who's all mouth, no substance. A nyaff is the sort of person who pesters folk, acts the big man, or carries on like they matter when really they're just a tiny dose. It's sneery, dismissive, and more eye-roll than full rage.
Usage examples
"That wee nyaff at reception’s giving it big, then greeting about the bins. New neighbour, apparently. Dinnae mind him, he’s pure noise."
"Some wee nyaff keyed my car and ran off, dinnae even have the bottle to face me."
"He struts about the office like he owns it, total nyaff, cannae even work the printer."
"Ignore him, he's just a wee nyaff trying to get a rise out of everybody at the pub."
"Her ex keeps firing off brave messages at 2am, absolute nyaff behaviour."
