The Mooning of Amtrak is annual event in which thousands of participants come to bare their naked butts to the Amtrak train. This takes place in Laguna Niguel, California.
If you want to see hundreds of naked butts, go to the annual Mooning of Amtrak in Laguna Niguel, CA.
An erection caused by the arousal from the mooning of another person.
You can’t help but masturbate as long as the other person keeps showing his/her ass, a.k.a. full moon.
You: I have the weirdest boner.
Me: That’s mooningglory you’re having.