Geppett

Something nasty and foul. Disgusting and rancid. Minging, rank, putrid.
The slang term is based upon Pinocchio’s nasty ass dad, Geppetto. Who stinks like shit all the time because of his exceptionally poor hygiene.

“Ugh, change your trousers. They’re mega geppett”

“Ew, stinks of geppett in here”