To fart, then walk past an unsuspecting victim very close, preferably while in a small room (copy room, broom closet, etc...) and say "fly by". After a second or 2 the victim will know what you mean. You can even make plane noises on the approach and retreat for added effect.
by jasondamailman December 31, 2007
Get the fly bymug. by GG September 29, 2003
Get the flyingmug. by MEGAN March 22, 2005
Get the FLYmug. The Fly's vomit on there food to help predigest it. Some women "crack whores" will do anything for a buck or two.
by Chakku Norisu December 25, 2009
Get the The Flymug. to run the fingers under your nose after fingering a girl to help make the crucial decision before going down on a girl.
by idleian January 16, 2008
Get the fly bymug. by GOD May 13, 2005
Get the fly fatass flymug. 