Someone who is not good at a particular video game.
Used in online play to describe usually younger, bad players.
"That 'Jabadapollard' kid is such a b.k.!"
The term was made and used by an elite group of gamers associated with the Halo 3 team Love and Cuddles. Sausage x J and uShift came up with the term.
"Watch out for those Reflex Bucket Kids"