(also known as mainlining)
The point where you/someone else injects/puts drugs into them self with a needle.
This doesn't have to include bad drugs eg. speed,heroin and any other drugs.
This can include drugs like; The chicken pox injection to prevent you from getting this disease.
the Doctor injected me with a prevention for cervical cancer today.
First Guy: Dude, what you injecting now?
Second Guy: Just Some more speed......
First Guy: Dude, you're gay if you use drugs!