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1 definition by jamesfuckerr

 
1.
bucking = back fucking

basically, a guy rubs his hard cock on the groove on the back of a girl, right above her ass until he cums all over her back.
yeah man, me and julia were bucking last night. i jacked off my huge cock between that little groove in her back and came all over her back and her hott ass.
by jamesfuckerr December 10, 2007