Messunk; being so drunk you continually hit the wrong keys while talking to a friend on a messenger service.
Depending on the depth of drunken state of the messunker, letters may be severely misplaced.
A combination of the words messaging and drunk.
Sam: rhe pleather is jinda nicr
Isabelle : ... dude, are you messunk?
Sam: I nay gave jad a tet.
Isabelle: fail...