Much like a happy trail, a thin patch of hair extending from your lower back to the depths of your asshole.
I tried having sex with a blind girl, but she accidentally went down my Backy-Trail.
by Scratches February 15, 2014
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slang; generically used to signify an illicit substance that cannot be procured in any ordinary means by the general public. An essential prerequisite involves an uncharacteristically underground drug dealer who conceals him/herself in little conclaves on certain un-lit side roads, selling these aforementioned illicit substances.
Hey, I saw Swathi today outside UCL. She was smoking a bit that wacky backy!
by Venkat.Thiagarajan April 21, 2010
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A phrase describing the buzz you feel when you first start smoking cigarettes. Often includes lightheadedness, laughing, or a slight tingling or numbness of the body.
I just smoked my first cigarette and I'm backie buzzing.
by kn0w1ngg August 29, 2013
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Used by Kurnel Krool and JTG in the song 'Wacky Backy' which talks about mums smokin weed!
by Ben May 06, 2005
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The female pubic area as viewed through an item of clothing - usually bikini bottoms. Refers to it looking like the lady in question is hiding a pouch of tobacco down there.
Check out that womans backy pouch - is that Old Holborn?
by ooo-yer January 13, 2010
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Backy penis is just a normal Roll-Your-Own Cigarette with a slight change.

Before you put your loose tobacco(Backy) into to your rolling paper, you rub the particles of tobacco over your penis or anothers penis. For extra pleasure some people ejaculate over the tobacco.
Peter: "Simon! You want to do some backy penis tonight?"

Simon: "Yeah sure. I'm up for that man"

Peter: " What shall we do? sperm or no sperm?"

Simon "Sperm!"
by Electromad May 10, 2010
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a badly maintained and managed female bikini line.
She was fine apart from the loose backie hanging out of her pants
by sendoola August 20, 2007
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