Top Definition
The act of performing anal sex with a girl then titty fucking her leaving a streak between her breasts thus resembling a highway between the mountains.
I was so horny I gave my girlfriend a rocky mountain highway. She was washing shit off her chest for days.
by Brian Euvino May 19, 2008
1 more definition
The act of performing anal sex with a girl then titty fucking her leaving a streak between her breasts thus resembling a highway between the mountains.
I was so horny I gave my girlfriend a rocky mountain highway. She was washing shit off her chest for days.
by Brian Euvino May 16, 2008

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