Top Definition
A variation on the tittyfuck, one man will place his penis between a woman's breast while kneeling over her face. Another man will kneel over the woman's abdomen while facing the other man, and also place his penis between her breasts. The two men's penises will be pointing at each other and may even touch at times, like two trains passing in the Chunnel.
That girls ginourmous boobs would be great for chunnelling.
by El Mochilero May 25, 2008

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