A guy or gal who lurks around your boyfriend/girlfriend and serves as a stand-by fuck when you two aren't together.
Wow dude, that Chris Lucero is a real stand by fuck - he fucks your girl every time you guys have a fight.
by believergeliever June 30, 2011
Usually uttered by a very pissed off NCO when informed of something unsat(isfactory). A lengthened version of STAND BY, meaning to await further instructions, in this phrase, that person told to stand by better be trembling in their boots, have their shit squared away, locked and cocked and waiting for an asschewing.
"You better make sure that head (bathroom) is clean and the Gunny likes it or you can Stand the fuck by on getting out of here this weekend."
"No, sir."
"STAND THE FUCK BY, DID YOU JUST TELL ME NO, RECRUIT!!!???"
"No, sir."
"STAND THE FUCK BY, DID YOU JUST TELL ME NO, RECRUIT!!!???"
by Hypo January 27, 2006
by beastyboi August 19, 2008