omnomnomnom 

Describing something being eaten usually in a humourous way.
.

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.

omnomnomnom by onlineamiga June 21, 2008

Omnomnomtacular 

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)

Ex. "This cheesecake is omnomnomtacular!"

Ex. "Bacon to cure this hangover? What an omnomnomtacular idea!"

Ex. "Oooohhh (insert attractive male/females name) is looking omnomnomtacular tonight!"

Omnomnomtacular by Kschez April 4, 2011

omnomnomnivore 

everything eaters

I am an omnomnomnivore!

omnomnomnivore by TheOriginalOmnomnomnivore August 4, 2014

omnomnom 

What one says when eating something very good, or when eating quickly.

Onomatopoeia for Cookie Monster's war cry when invading the cookie jar.

A vague reference to oral sex, especially on a female.

Person one: Hey, have you tried these new cookies? They have fudge, caramel, and nuts on the inside, outside, AND in the chocolate chips themselves! Here, I brought some for
Person Two: *OMNOMNOMNOMNOMNOMNOM*

Person One: GOSH I SURE HOPE NOBODY TAKES THIS GIANT COOKIE I'M LEAVING ON THE COUNTER.
Cookie Monster: *Swoop* *Grab* *Bulimia'd* OMNOMNOMNOMNOM.

omnomnom by Iggor November 10, 2006

omnomnom 

1. Eating something very fast or messily
2. Used to describe someone sexy
3. Used to describe making out
4. Basically coined by Cookie Monster

1. "Mmm, cookies." *omnomnom*
2. "Ooh, lookit that yummy guy over there." "Mmm, omnomnom."
3. "It was so gross. They were kissing and it was like, 'OMNOMNOM'"
4. "Cookie, cookie, cookie starts with C! OMNOMNOMNOM!"

omnomnom by LammySees June 23, 2008

omnomnomelet 

A particularly delicious omelet.

For breakfast on Sunday my mother made the most delicious omnomnomelets for my family.

omnomnomelet by monikawithak September 6, 2010

omnomnomagon 

Pentagon has five sides
Hexagon has six sides
Octagon has eight sides
Omnomnomagon... is the shape of Cookie Monster

Cookie Monster is no longer just an amorphous blob. His shape will hence forth be known as an omnomnomagon.

omnomnomagon by Johnny5ive September 14, 2011