a woman with abnormally saggy tits(breasts for you lay people)
wow look at that sackrack, her boobs down to her knees!

kid: mommy, how come that lady has boobs down to her ankles?
mother: because she is a sack rack sweety
by Watamellon's Zipcode June 29, 2005
When a guy gets kicked, hit, or otherwise sustains pain to the groin area.
Sally kicked Jimmy in the balls. "That was a sack rack".
by jspoke73 February 27, 2011

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