by BahamaBoy June 21, 2005
Get the flapmug. When a naked man swings his hips from side to side - causing his penis to alternately hit each of his thighs, going from side to side.
by Lotta fra Bråkmakergata August 16, 2007
Get the Flappingmug. by Chris April 14, 2005
Get the flapmug. by Tylers88 August 3, 2017
Get the Flappingmug. 1. She had no knickers on and you could see her flaps
2. Sorry I didn't come out with you guys last night... I flapped it!!
2. Sorry I didn't come out with you guys last night... I flapped it!!
by 123x May 11, 2011
Get the flapmug. 
