Sack to back is the term used when two males ride a motorcycle or scooter together.
Also referred to as "Butts to Nuts"
Those guys are riding "Sack to Back or Sac to Back"
by Indetrucks March 4, 2011
mugGet the Sack to Back or Sac to Backmug.
Self explanatory.
If you don't like rap music, then get the fuck off my definition and get your bitch-ass to suburbandictionary.com
It is a song that you should know.
by Diego November 21, 2003
mugGet the I'm going going, back back, to Cali Calimug.
Similar in nature to Rock out with your cock out, but in a more relaxed manner.

See also Rock back with your cock back.
Well, if you don't rock out with your cock out, then maybe you should just kick back with your dick back.
by Pessetti June 1, 2009
mugGet the Kick Back with your dick backmug.

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