A nickname for the beautiful thing called a penis. It's a glorious name for a glorious dick, and if you've been told you have a sling dong, you're set for life.
Bria- "Have you seen Kendall's sling dong? It's amazing!"
Cristhian- "Please, Evan's sling dong is way better!"
by AyeEvansSlingDong July 18, 2014
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