1. Difluorine dioxide
2. The sound FOOF makes when it reacts with pretty much anything.
The FOOF went "FOOF!" when I spilled it on the floor. Now I have to explain the crater to my landlord.
by R-dog December 15, 2013
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The street name for administering drugs via the vagina. An effective but unconventional way for someone with a vagina to take drugs.
My friends sister likes to foof her drugs instead of snorting them. ,

My girlfriend had a cold so she tried Foofing her drugs and it worked well she said.

I fell asleep and when I woke up my now ex girlfriend said she had foofed all my drugs.
by Boofing it July 3, 2020
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The word everybody older than me used instead of "vagina" until I was about sixteen. I still use it now, probably due to force of habit. Even when I'm talking dirty to my missus.
Me: "Does that make your foof feel good?"
Missus: "My what?"
Me: "Too late, anyway."
by The Scandal April 6, 2005
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A form of flatulence, often found in small unhearable noises coming from your butthole. Similar to the "silent but, deadly" category of passing gas.
Ahh shit i just foofed.
by Dr. Gluteus Maximus February 21, 2009
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An expression after the realization of an amazing occurrence.
after a wicked hot girl walks by
Dan: Hey Paul, did you see that hot girl?
Paul: Foof..!
by Alpacino January 20, 2009
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Getting dressed up, dolled up, adding a bit more glamor to your current appearance. Doing something extra nice to your hair, clothing, etc. Looking more "hot" than you already are!
I am going to get a little foofed up tonight, so I'll look good for my hot date with Jeff.
by Sarahricaz August 1, 2008
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slang term for the female genitalia. Much less vulagar and more acceptable than the alternative pussy or cunt. Most often used by girls themselves...
Amy: omg, i think i've got another yeast infection!
Kat: oh goodness, what makes you think that?
Amy: well my foof smells awful bad!

Max: man, i scored last night!
Zak: You feel her foof or what?
by sexybexy December 21, 2005
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