To "Mumph" is to lay out over a chair or couch/sofa in a state where you do not care what you look like, but just want to relax.
on the chair with a slice of pizza in one hand and a diet coke in the other, oblivious to the people staring at him.
The word klool, is same as lol(laughing out loud) but because reading lol, is not nice to the ear some people often use klool.
1st guy: Grisha, what's your name?
2nd Guy(Grisha): klool