A busta is somebody who ruins things, be it robberies at pizza places or attempting to follow a train.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

The person at the top left of the screen

Poser--wanna be--one who fronts.

very stupid, the definition of imbecil. But everyone starts at the bottom aint I right?

a person who cant hold his own , always gettin punkt out.

Not cool; someone with the ability to work but who refuses work; someone who depends on others to get by