syfm 

Shut yer fuckin mouth. much similar to stfu

syfm n00b i pwn you

syfm by haMz October 7, 2004

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!

SYFM by ChigglyWiggly May 9, 2007

SYFM 

SYFM - meaning "SHUT YOUR FUCKING MOUTH".

usage is like sybau, "SYFM🥀"

SYFM by lilman418 May 29, 2025

Syfm 

An abbreviated word for "Shut your fucking mouth"

Dumbass: Sorry but zahide won this trend
Person: Syfm🥀

Syfm by therelnob June 15, 2025

syfm 

SHUT YOUR FUCKING MOUTH

HEY YOU SYFM

syfm by meowserrrs June 27, 2025

Syfm 

Insulting and vulgar way of telling someone to shut up or silence themselves. It translates directly to "Shut your fucking mouth."

"Syfm you fool."

Syfm by Qwertz24 July 5, 2025

syfm 

an abbreviation for "shut your fucking mouth", kind-of has the same meaning as "shut the fuck up"

"hey i was wondering if i ca-"
"SYFM BITCH"

syfm by a4tech_keyboard2 July 5, 2025