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its an adjective for a person being weak
Look at the sacky girl/boy... Dude, quit being so sacky
by Bigwun07 January 28, 2009
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2
A person with a disease that includes symptoms of dumb comments, fat face, drooling, and drooping tongue. Results in not attracting any women or surprisingly men either. Being a Sacky is not a good thing in fact, it could be hazardous to your health and ability to form relationships. Suicide is the only cure. Square on.
When Jon did the JRC he looked like a big Sacky.

Square on Sacky, square on.
by Kevin Sac October 10, 2009
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3
to chase one girl for several years despite being shut down several times
1. johno has been on the sacky
by will hodgkinson November 16, 2005
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4
To be composed of luck, usually of negative expected value.
Guy 1: "I just won $75 at the casino!"
Guy 2: "That is so Sacky!"
by BlueEyesWhiteBoy August 19, 2012
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5
Male Briefs. Underwear that holds the ball sack in a confined area.
My jank is hell of sweaty cause I've been wearin' these sackies all day!
by Bappleseed May 10, 2007
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