Omegamouth 

When you get way too high and SUPER thirsty

“Yo i was so fried last night, i had fuckin omegamouth”
“Yooo, that sucks. You probably chugged a whole gallon of water bro”

Omegamouth by n1ggabeans September 23, 2019

Omegamooh 

From the movie "Revenge of the Nerds":
A sorority called 'Omega Mu' (known as the Mus, which sounds like "Moos") composed of mostly fat and ugly girls.

Same as Omega Mu (also defined on this site), but more focused on the target looking like a cow.

Do you see that fat girl standing over there?

Oh, you mean the omegamooh?

Omegamooh by Keefaru April 18, 2008

Megamouth Shark 

A species of shark that was discovered in 1976 when a U.S. naval ship caught one on its anchor. Scientists dubbed it megamouth, for obvious reasons. Since then, the shark has been proven to be extremely elusive. Only 100 specimens of them have so far been found, but every one that can be examined reveals new information about these strange sharks.

Megamouth sharks can grow up to be 18 ft. (5.5 cm) long. To fuel such a huge body, it needs a lot of food, but, surprisingly l, this big fish is not a big game Hunter. It's a filter feeder and most of its diet consists of tiny, planktonic animals, which it strains from the water.

Megamouth Shark by Nordicdragon June 27, 2018