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2.
Masturbating while under the strong influence of marijuana.
T: "Bobby just toked all our chronic! Where'd he go?"
D: "Oh probably high jacking..."
T: "Haha sweet"
by Epic Jubs November 13, 2009
 
1.
The act of masturbation on an airplane.
Joe: Hey bra, you were in the bathroom for a really long time.
Jim: Dude, I was just high jacking, gotta get in the mile high club somehow.
by willklinton August 06, 2013
 
3.
The act of pleasuring yourself, while enjoying the effects of marijuana.
That OG Kush was great! I was high-jacking for hours.
by herpotprince March 13, 2014