The sexual act of when your female partner is on her period so she uses her period blood as lube to then give you a handjob.
"So did you crush that chick last night?"

"Naw man, I couldn't she was on her period."

"Aww shit that sucks hahaha."

"Yeah but she still gave me a jelly dog."

"Aww come one man thats gross hahaha."
by 24arod24 September 25, 2011
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A slang term for having vaginal penetration with a female on the rag.
While sinking his wiener into Pam, Jim realized he goofed and had a jelly dog on his hands.
by WishIWasAMexican February 16, 2011
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