the act of vomiting into a girl's vagina before having sex with her. doing Acid Rain usually results in Hydrochloric Penis (burns on the penis from Hydrochloric acid, or better known as stomach acid).
Man, that Acid Rain last night was amazing, but now i have a bad case of hydrochloric penis
by The Goatress November 18, 2010
What planet did this kid come from? He's so fucking leet no one can touch him.
by Anonymous February 28, 2003
The Energy Drink mixed with Jaegermeister and a hit of Acid.
Dude that Acid Rain will fuck your shit up
by T-P-L July 03, 2009
Melting a fudgsicle in a girl's anus, and then sucking it back out.
Girl, you shoulda seen it! I had goosebumps all over... AC gave me the acid rain last night!
by poochikins March 02, 2011
the act of expelling gas (farting), then urinating on them. Similar to real acid rain caused by rain passing through hazardous pollutants in the air (smog)
I know you're into golden showers, but how about some acid rain instead?
by akhkhazu February 21, 2009
The act of eating a large asparagus meal and promptly pissing in a bitches mouth.
"I was curious why crazy joe grew asparagus, i found out later that night when he gave me acid rain."
by skeetmod valentine July 13, 2008
When a woman is giving a man head and she vomits on his dick mid-blowjob
Dude I heard about you last night. She pulled the old acid rain on you hoo hoo
by Get after it hoo hoo October 12, 2008