The slimy sweat build up on your sack crevice from sitting in one position for an extended period of time. A combination of sweat and stench molecules.
After watching 2 series of breaking bad my sack syrup smelled rancid.

I could smell Tims sack syrup from over here after he completed gta 5.
by cusbuster February 22, 2014
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White, crusty, semen that dries onto pubic hairs and/or a ballsack after fucking or jerking of repeatedly.
The sack syrup on my balls flaked off onto Becky's chin before I realized I should probably get a shower. (note: Paint thinner could aid the cleansing process).
by Mark B. H. August 21, 2006
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