The word originated from combining clumsy and bek, a synonym for master, hence clumsy master. Due to constant misspellings the word has evolved to its current spelling, Klubek.
Bethany walks over while eating some cereal.
Bethany: Pretty good...
As Bethany speaks food flies out of her mouth and onto Mark's shirt.
Mark: WTF! You just klubeked all over my new shirt!