A male that chronically masturbates to internet porn. Typically unemployed, lives with parents and can't otherwise function without his dick in his hand.
Carl's a weasel slapper. He doesn't work, lives at home with mommy and faps all day to like 10 different porn site accounts.
by Eaton Holgoode April 26, 2017

term used by investigators to describe a suspect/target who requires one slap to start him talking and a second slap to shut him up...
by sheila in the car May 18, 2009

Sarcastically used to point out an unfunny joke. It originates from the act of slapping one's knee during vigorous laughter. Later took on a sarcastic meaning.
Comedian: I just flew in from Los Angeles, and boy are my arms tired!
Audience member in sarcastic tone: wow that's a real knee-slapper
Audience member in sarcastic tone: wow that's a real knee-slapper
by Joe February 11, 2003

by luckylewk July 30, 2004

A lesbian.
by The Atomic One May 7, 2011

A lady who has the appearance of being prim and proper. Well dressed, polite and seemingly perfect but deep down she's a slapper.
by Lily & Becky November 5, 2010

A semi-affectionate term for night club podiums which the drunkest/most extrovert members of your party will want to dance on.
by rmg September 29, 2003
