Nancy was English slang for 'buttocks' in the 1800s, but by the turn of the century the description changed to "face of an effeminate (Nancy) or gay man". Variations include nancy boy and nance. So the phrase is used when someone looks like a spanked bum, all red and embarassed.
by Thenamesbanana September 03, 2009
A singular slap to the back of the neck when someone you know recently has a haircut within the past a day or two
by Dreamon313 May 02, 2016
A light "whappp" to the back of the head, done with an open palm in an upward motion. The physical equivalent of the phrase, "Whatta you, a moron?!"
by JonathanChance June 29, 2003
when a woman has such a loose vagina that the lips of said vagina hang down and clap together when she walks.
by Vlad Nemervitsky September 29, 2010
by sweetness-and-light May 01, 2007
The action of ejaculating on one's hands and then slapping someone across the face, leaving a white hand imprint like the mark of Saruman in LOTR.
by wupthefuckingdoo April 11, 2009
by Sledgehammer October 09, 2004