When an insignificant person either says something that no one cares about or says something completely out of context. This expression is also used to make people who don't get references/jokes shut the f*ck up when they don't add any valuable input to the conversation.
Person 1: *tells a joke*
Person 2: *says something retarded completly unrelated*
Person 1: stfu massa
Person 2: *says something retarded completly unrelated*
Person 1: stfu massa
by Paclone March 18, 2020
 Get the stfu massamug.
Get the stfu massamug. by Eymen April 24, 2022
 Get the stfu eymenmug.
Get the stfu eymenmug. billy475633555433573456735875676: Hi im new to this game, can anyone help me?
1337PwNz00r: stfu noob
billy475633555433573456735875676: oy na youre a fag and you probably play this game every day and work at like McDonalds for 50 cents an hour.
1337PwNz00r:stfu noob!
billy475633555433573456735875676: just cos its true...
1337PwNz00r: stfu noob
billy475633555433573456735875676: oy na youre a fag and you probably play this game every day and work at like McDonalds for 50 cents an hour.
1337PwNz00r:stfu noob!
billy475633555433573456735875676: just cos its true...
by billy475633555433573456735875676 March 15, 2008
 Get the stfu noobmug.
Get the stfu noobmug. by loliguts March 11, 2021
 Get the Stfu Toastermug.
Get the Stfu Toastermug. by mikeisnoob October 28, 2004
 Get the stfu noobmug.
Get the stfu noobmug. "Shut the F*ck up newbie" Used to offend people two ways. If they're not offended by "Stfu" then they will most likely be offended by "nub" because it is a game... and people think they're god when they play games and when they're told the truth they get mad.
by Bill B December 16, 2003
 Get the stfu nubmug.
Get the stfu nubmug. 