Arguably the highest level of being fucked up. Mongoed is the stage above zooted and very close to death. Usually involving elements of cross-fading or triple-fading to the extent that one has lost nearly all mental and physical function, leaving them as a simple mongoloid. One does not always survive being mongoed.
Bob: Dude, lets get mongoed tonight.
Rob: Lets do it! I got a bottle of Everclear and some xans.
A word used when you're so drunk that you can't actually talk/spell/do anything. At all. Except lie on the floor, texting your friendsnonsensical messages.