a phrase that synonymous with "to perform cunnilingus on a female". The term refers to the yearly cleaning, or mucking, of a dirty livestock barn, with the mucking describing the act of cunnilingus and the barn being an unwashed vagina. The term was coined by homosexual hockey players who were disgusted with the thought of performing oral sex on women.
After a long day's work, Jake loves to go home, put something comfortable on, flip on the fire place, have a glass of wine, invite Brandy over, then muck her barn
by J. Kloos December 4, 2013