To use or abuse a drug, most notably heroin. This term stems from the heroin use by famous bebop and jazz musicians such as Charlie Parker, Miles Davis, and John Coltrane. however, because jazz musicians historically transported marijuana around the US in the early 1900s, this term may be used to describe usage of many drugs.
Musician 1-"Why did charlie fall asleep on stage? He was killing!"
Musician 2-"I saw him kick it bebop style an hour ago. He must be catching a good nod."
A bebo moment, is when a individual has a moment of stupidity, or retardation on a scale so big that they cannot identify the reality of their dumbass mind.
"Dude! Your having a Bebo moment stop being a fucking retard"
"Uh oh, he's having a bebo moment. Grab the bat"