Not blessed with either the education or as I now see the life experience to know the relevant term, I sought enlightenment through research. The result amused so that I wanted to share.
Source:
http://www.urbandictionary.com/define.php?term=Bitch+Slap
John Powers
1. bitch slap
To open handedley slap someone. Denote disrespect for the person being bitch slapped as they are not worthy of a man sized punch. Suggests the slap was met with little resistance and much whining
Kieth owed me that $20 for weeks and I had to bitch slap the M.F. to get it back.
2. Bitch Slap
As distinguished from the more common "pimp slap", a bitch slap is preceded by ample forewarning and delivered with a flourish or exaggerated post-blow hip movements. Nonetheless, the blow is firm and may involve an open forehand or backhand.
A "pimp slap", to the contrary, is regularly delivered without announcement and oftentimes over breakfast at an IHOP, on a subway platform, or numerous other indiscriminately chosen venues. The blow is always, always struck with the back of ones hand as to do otherwise is bad form. And the hip motion that accompanies a pimp slap provides the torque to knock a bitch silly.
Those guys on Christopher Street like to play around bitch slapping each other and running and shit, but I didn't know what a proper pimp slap was until Charlie the bus driver knocked his old lady silly at a Starbucks the other day. Apparently Charlie told the misses not to use bleach on his draws as the bleach makes him itch. All I know was that Charlie was scratchin his nuts real hard before he set that latte down, planted his feet, twisted his body and, with his knuckles initially scraping the floor, uncorked the definition of a modern day pimp slap. Old girl was out for a good five minutes.