Geared Up

High on drugs that have been injected using a needle (most commonly methamphetamine and heroin).

"He's geared up for sure."

Gearing Up

Verb for gear up

"Where's Bill?"
"Gearing up in the other room."

Gear Up

To inject drugs (most commonly methamphetamine or heroin) by use of a needle.

"All the boys are gonna gear up at the party. Do you want to as well?"