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
Get the Rocky Mountain Highwaymug. 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
Get the Rocky Mountain Highwaymug.