GSDMF 

GSDMF stands for Get Shit Done Mother Fucker. It is a derivative of GSD, which stands for Get Shit Done. It usually refers to some sort of work or task, and is used when a GSD just isn't enough to get the point across.

Employee: I have so many things to do today before I leave.

Boss: GSDMF!

GSDMF by RayRay1313 March 26, 2011

GDMFSOB

God Damn Motherfucking Son Of a Bitch

DJ Shadow feat. Roots Manuva - GDMFSOB (U.N.K.L.E. Uncensored Mix)

GDMFSOB by Krusher November 10, 2008

GDMFG 

God damn mother fucking genius

The guy that invented the vagina is some sort of GDMFG

GDMFG by Lascivious September 25, 2009

GDMFCS

Explative to convey EXTREME displeasure

God Damn Mother Fucking Cock Sucking

GDMFCS MSN logged me off again!

GDMFCS by Tamz September 18, 2006

GDMF

god dammned mother fucker

"That gdmf just let loose in the elevator!"

GDMF by zerosum November 27, 2007

GDMFer 

Acronym for: God-Damn-Mother-Fucker

I hate that guy. He's such a GDMFer!

GDMFer by Ian Ward October 2, 2004

GDMfugly 

Goddam Mother Fucking Ugly.

Pronounced Ga-DUH-MUH-fu-glee

An extention of fugly.

That dude ain't just fugly, he's GDMFugly.

GDMfugly by Nottobrite September 19, 2005