when you are pounding a fat chick in the butt/from behind and her fat proceeds to make the clap sound
by Thug Butter Shooters June 27, 2007
by matheydray June 24, 2021
Stands for Simultaneous Mutual Companionable back-clap, and is used to describe the warmly-affable gesture that two super-sociable best friends (usually two cool dudes, but hot chicks occasionally share one, too, or a guy and a sturdy-figured cutie) perform to signify an agreement, encourage each other to begin a boring/difficult/disgusting task, start off on a stroll together, etc. It simply involves exchanging a huge beaming ear-to-ear grin, then putting an arm around each other's shoulders and landing a good-natured thump on the back to indicate their hearty positive feelings and congratulatory appreciation for each other.
Freckle-faced southern tomboy: Ah always loves to help da local farmer-boys wif their chores and play volleyball wif dem, and my fahvorite part is the s. m. c. back-claps dat dey always smilingly gives me throughout the day... makes a gal feel purrty and appreciated!
by QuacksO March 8, 2017
to return fire.
by the mighty Ru March 21, 2004
by SiLeNtShAdOw March 4, 2006
by da1 November 4, 2003
by snotty nose February 11, 2005