Abbriviation for "Shut up for one second". Use it during conversations when people just get very annoying or just won't shut up for one second. Online and IRL.
PersonA: And then I went .... And then I bough.... And then I saw .... And then --
PersonB: SUFOS! You are so annoying!
PersonB: SUFOS! You are so annoying!
by Olesya July 05, 2005
Nat I've been telling you for 10 days now I wont give you my Apad as much as you want it so just SUFO.
by B247E August 19, 2010