Top Definition
Shut yer fuckin mouth. much similar to stfu
syfm n00b i pwn you
by haMz October 07, 2004
9 Words related to syfm
Short for "shut your fat mouth".
CrZyLdy77: omg! i just got tix to see fall out boy!1!
MUNKYchick12: no way! SYFM!!!
CrZyLdy77: no, rlly!!!!!!!!!1!
by ChigglyWiggly April 28, 2007

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