oh my fucking god, with wow added for the element of surprise or shock. Of course also used for reversed effect normally followed by obviously.
Stu: Coyne is here
m00se: Shep bums goats!
Stu: Womfg, obviously
Wow Oh My Fucking God - Used randomly at the beginning of sentences to show extra surprise. Also used sarcastically when something really isn't shocking.
WOMFG you have a cow on your head.
Wow! Oh My Fucking God!
Womfg! Your hairs on fire!
Jordan: Party at mine tonight
Stuart: Womfg! Cool
womfg their hott!!!?
woah oh my fucking god its too hot today!!?