A person who posted on this site what Fuckley meant, but did not have any right to do so because they have no fucking idea what they're talking about.
Characteristics of KLU:
can also be deciphered as shit head
When dumping your shit in the toilet there's always this last piece which, no matter how much you push, simply stays put in your arse. Thats is the klu.
Also a nickname for sticky people
"What have I done to deserve this danm klu"
"Get lost klu"