When a man lights his penis on fire and has sex with a woman. It also frequently refers to the act of intercourse with a lit penis.
Hey do you want to go to a movie tonight? I can't, I have to get skin grafts because I gave my girlfriend the flaming slong last night.
by Gerbil Wellington September 16, 2010
Get the Flaming Slongmug. Term used when a male perpetrates having a well-endowed penis, when in fact, to his partner's surprise is actually the opposite of large. In this case, see peter petweeter.
by geniusH August 6, 2006
Get the perpin' the slongmug. by Mr Fo April 29, 2008
Get the slong coastermug. by jo ho witness July 31, 2006
Get the dong slongmug. by cptsnowblow March 6, 2018
Get the slong monstermug. 
