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To get "high" on heroine through the means of an introvenus-needle. I.e. - Shooting up.
Addict: Yo, dog... Yo got the shit to lemme rock tha mainline?
Dealer: Fo' sizzle ma nizzle, that'll be fiddy.
by God May 20, 2003
3 3

Words related to Rock the mainline

jack the mainline addiction drugs heroin mainline rehab