when someone gets excited about something

A fad. A clever marketing strategy which a product is advertized as the thing everyone must have, to the point where people begin to feel they need to consume it.

To get extremely excited over something that's not that exciting ..

fun, rowdy, or wild

Fun, crazy, wild or exciting

Wild and flashy valuing style over substance with a breakneck pace.
Often makes little sense upon analysis, instead taking refuge in audacity and emotions.
Popularized, but not invented, by Woolie of the Two Best Friends video group.

a drug user who's method of administration is with a hypodermic needle, or syringe.