look up any word, like cleveland steamer:
 
1.
A guys huuuuuugeee dick or boner ;)
Emily: mannn, i was reaching for gum and accidentley grabbed his grape pop!?
Becs: reallly? are you sure you were reaching for his gum ...? noo wayyy !

Mady:what did it feel like!?
by bammer grape pop May 05, 2011
 
2.
When a man fucks a woman with one of his testicles rather than his cock. thus popping your grape into her pussy.
My left nut is sore from that grape pop i pulled off with nancy!
by marc and alex March 31, 2007