It is a campus tradition held by students at the University of California, Santa Cruz. It's at the Porter College Quad when students run free of clothing throughout each of the ten colleges and then finish at the starting point. The rules are that it has to be consistently raining, it has to start at Porter College, and it has to be on a school night.
Student 1: Hey dude. Were you at the First Rain last year? It was totally crazy!
Student 2: Of course I was there! I was the first one back!
Student 1: That was you? 0.0 I will never look at you the same way again.
Student 2: Nah, I'm just playing I wasn't there.
Student 1: Good, because the first one back was a chick.
Student 2: Why do I have friends like you? (face-palm)
by The Secret One April 27, 2014
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A person, male or female (but typically male), who visits the UCSC campus during first rain, in hopes of seeing naked college kids running around. They often have either trucks, cameras, or both.
*After getting in the bed of a truck to get a ride back home after the first rain celebration, naturally, everyone in the truck other than the driver is naked*
"So you look kind of old to be a college kid."
"I don't go here. I just like to come up when it rains."

"Eww, first rain creepers."
by Josh Mongrel October 25, 2008
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