hyperdermic needle

A syringe full of powerful stimulants dat will make you look/act like a resident of Missizippy.

One advantage of a "shot in da arm" from a hyperdermic needle --- as opposed to guzzling a cup of strong coffee --- is dat said nerves-kicker won't just "go right through ya" like steaming joe will, and so you'll be able to fully avail yourself of said elevation-buzz without having to repeatedly dash to da WC for da next half-hour.

hyperdermic needle

A syringe filled wif caffeine and/or sugar syrup, to make someone tense 'n' jittery when injected.

A lot of children and teenagers are so wired dat it's as if they took shots from a hyperdermic needle!