1.an expression having a discretionary undertone and is usually used in a state of confusion, or as an aid in connecting lies or other words into informal grammatical conversations; a word that assists in a person’s conversation.
2.usually used by tweakers to finish up their elaborate lies.
Man: Where did you buy those imac computers?
Tweaker: um, I was working for this guy....um.....and he hella hooked it up. All I did was ummmm...