Doing a 'Dirty Fearns' is to squirt your man juices inside the suitcase of an inoccent party during a holiday or short break.
Two men sharing a room on a stag weekend, they get drunk - one falls asleep and while he is in the land of nod, the other man does a 'Dirty Fearns' in the innocent sleepers suitcase. This is a 'Dirty Fearns'.
by James_Whitely December 20, 2006