Oh My Fucking.... die.
When someone says something that they think is amazing and you think is insignificant and that the person who said the original mark does not deserve to breathe the same air as you.
Person 1: DUDE THE DELL GUY GOT ARRESTED!!11
Person 2: OMF...D?
Person 1: Nooooo! *dies an awful death*
*Person 1 grows up to be the next porn legend, is rich, and is worshiped by all for his extreme coolness.*
OMFD stands for "oh my fucking dick", although the d letter can mean something else. It was invented by some random newbie saberist in JK2 and used a lot by more random newbies such as gunners.
Acronym; commonly extrapolated as "oh my fucking dog."
A term coined by the founders of the Church of Dog in the modern age of acceptability. It is often used by people whom hold dogs in higher regards than the mysterious, albeit conveniently absent figure that is God.
Users of this phrase commonly find little comfort in religion and the realm of spirituality, so they choose to modify the commonly used acronym "OMFG" in order to meet their standards of disbelief or arbsurdism.
Keren: *sends picture of adorable husky*
Max: "Sweet lion of Zion she's so precious!"
*immediately reciprocates with picture of cute lab mix*
Keren: "OMFD she's such a little bloop"