An exciting event that occurs and thereafter causes a woman's vagina to instantaneously become wetter than a slaughter house floor.
1. Kim,"Jeez Debbie that guy is so sexy."

Debbie, "Yeea I just had a flash flood."

2. Fact: Kieth Richard's pelvis gyrations cause women to have flash floods.
by Brett schu June 5, 2010
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The over excitement of a female in the moments before sex causing an excess of vaginal fluid.
Did you cause a flash flood before you hit that?
by dklee January 9, 2009
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Sneak up on a person and jizz on their face and yell "FLASH FLOOD!!"
Mike snuck up on Suzan and yelled "FLASH FLOOD!!"
by Filthy Fetus Face August 12, 2008
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The phrase used to describe when you have a sudden intense urge to shit
Person A: I heard you got diarrhea last week.
Person B: Yeah. Had a lot of flash floods.
by Dasoderp December 15, 2016
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n.

An unplanned, usually unjustifiably long session of watching several videos on any Flash video site that recommends more videos, usually resulting in some variant of YouTuberculosis; analogous to an addictive video link surfing episode.
"I was just going to watch that one video, but then these other two videos looked funny, and before I knew it I was drowning in a Flash flood... and that's why I need an extension on the paper."
by usman noyo December 2, 2007
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The Male-to-Female equivalent of a "Snowball". Wherein the Male partner spits a large amount of vaginal fluid (gathered through oral sex) into the Female partners mouth while kissing.
"So this guy sucked up all my pussy juice, and spit it into my mouth. I was like, What?! He was Flash Flooding me!!"
by Jettick Dussen August 16, 2011
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When you don't want others in a public restroom to hear your explosive diarrhea. You pucker up and you flush the toilet at the same time while you dump everything you've got. The toilet flush tries to cover your ass blast noise. Also gets rid of some lingering diarrhea smells.
Girl 1: Honey, I had to dump so bad but the bathroom was full and I didn't want to be embarrassed so I had to pull a Flash Flood Dump.

Girl 2: Dang I know what you mean hun, last time I did that the toilet cut off before I could stop. It was embarrassing. :/
by The Manchester Molester December 6, 2014
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