A way of saying "shut the fuck up", instead of actually typing it. Has less meaning than actually typing "shut the fuck up", and is often said by people that are losing an argument or can't think of a comeback.
Guy A: "You just contradicted yourself. Twice."
Guy B: "faggit"
Guy A: "Yeah, that's what I thought, you can't think of anything, loser."
Guy B: "stfu"
Guy C: Just admit you lost, Guy B.
Guy B: "faggit"
Guy A: "Yeah, that's what I thought, you can't think of anything, loser."
Guy B: "stfu"
Guy C: Just admit you lost, Guy B.
by Arch0wl May 17, 2005
Get the stfumug. online text-speak for "shut the fuck up".
by tip123456 June 25, 2009
Get the stfumug. When you honestly say something retarded, making you look like a retard, you're told "stfu :|"
Tbh you're not even funny at all, nobody fucking laughed. it's okay though, as long as you're not a retard, you can use this on people.
Tbh you're not even funny at all, nobody fucking laughed. it's okay though, as long as you're not a retard, you can use this on people.
by LordMaple March 21, 2021
Get the stfu :|mug. 
by Little Bobby Tables! April 2, 2013
Get the stfumug. Southern Tenant Farmers' Union (STFU): Large labor union, formed in Arkansas in 1934, which lobbied the federal government for better New Deal reforms. Dissolved in 1960. Commonly causes mirth among US History students who are aware of the acronym's double meaning.
by jer May 13, 2005
Get the stfumug. by Mirosui Onitsaki June 6, 2005
Get the stfusmug.