Expression brought into the end of a very emphatic statement, following various exclamation marks and a few ones, to further emphasize the idea that, well...you can't be seriously using the Shift key for all those exclamation marks.
An alternate version of 'OMG'
Pronounced 'oh-am-nay-gee!', it's a short for 'Oh My Non-Existent God,' instead of the usual 'Oh My God!'
If you don't believe in God, use this instead of OMG.
Someone may badly edit a picture and draw eyes mouth and teeth over it to show that the subject is being eaten. They would then write omnomnomnom on the picture.
What does James do anyway?
He's an omniologist.
Whaaaaat?
He studies the factual & philosophical nature of all theories of origin & their effect on man.
...Word?
When something is both delicious (om nom) and spectacular.
This word can be used in a broad number of situations (as shown in a couple of examples found below)