A rocky mountain is a are and solid shit, sometimes containing peanuts found an a sleeping victims chest. The "sunrise" is often added to the end of the phrase when the victims mountains are also urinated on.

Not to be confused with a Snowy Rocky Mountain, which is a shit with powdered sugar or semen on it.
Dude, Darryl gave us all a Rocky Mountain Sunrise. What a sick bastard.
by SouthParkSkiInstructor March 31, 2012
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