GFMO 

Go fuck my ocotopus

Why dont you just GFMO!

GFMO by Ressurect0rTehSex0r December 13, 2003

GFMO 

Literally: "God Fucking My Oh"
An alternate word for "OMFG".

"Did you hear that your mom is gay?"
"GFMO."

GFMO by Kai June 19, 2003

GFMO 

It means go f*** my orange. It's just like OMFG but backwards. It's an insult, really. In a way, like ktm - Kiss my teeth, or stfu - shut the f*** up. It's probrably the best insult ever invented because it overlaps every insults awesomeness.

Elle says:

You should have underaged sex, it'll be cool.

Bobby says:

Gfmo. No.

GFMO by ReinMaya - Chan May 9, 2010