A spooky dance move typically performed by two men before and after docking. Each must spread their cheeks as far apart as possible before ramming their rims together and producing an audible "thwack" (typically done in succession)
"Yo, you hear about Billy and Timmy slappin assholes the other night? I didn't even know they could dance!"
by moonholegal September 26, 2023
Get the slappin assholesmug.