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1.
A small and extremely skinny male reproductive organ, also known as the penis, which resembles that of a stack of dimes.
Tommy- "Why haven't you banged her yet?"
Kyle- "Because I'm rockin' a dimestack, basically my penis is so small it couldn't even satisfy a small rodent."
by Tommy and Kyle July 20, 2008
 
2.
When you walk into a room and there are a lot of ridiculously hot women. If a "10" girl is a "dime" you would be stacking them up.
"I just saw some dime stacks like I was on the set of Entourage."
by huister September 17, 2009
 
3.
A very tiny penis.
I was expecting an anaconda and I got a dime stack.
by MellyMelBell October 06, 2009