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1.
(n.) celebratory event held in the southern United States and possibly featuring some of the following: home-brewed hooch, straw hat, people 'dipping' socially, banjo, air boat, shotgun, confederate flag. interestingly enough, it tends to be wild, uninhibited and dionysian despite the socially conservative views of most of its participants
how 'bout 'dat hootenanny?
by Chris Cliche July 12, 2004
 
2.
A party, most generally one that is, well, chock full of hoot, with just a little bit of nanny.
Oz: We should figure out what kinda deal this is. I mean, is it a-a gathering, a shindig or a hootenanny?

Cordelia: What's the difference?

Oz: Well, a gathering is brie, mellow song stylings; shindig: dip, less mellow song stylings, perhaps a large amount of malt beverage; and hootenanny, well, it's chock full of hoot, just a little bit of nanny.

Xander: Well, I hate brie.
by Captain Milo March 24, 2007
 
3.
Songwriters in round-robin revelry-- sharing stories, songs and much muchness in an intimate setting.
The Mad Ripple Hootenanny is everything I love about music: Community & Songs
by miss muchness February 06, 2010
 
4.
A big chaotic party or get together. pretty much anything thats fun or funny. can also be used as an expression of surprise or damnation.
"That was quite a hootenanny when Mrs. Belcher started to polka in math."

OR

"HOLY HOOTENANNIES!"
by Beetle November 08, 2004
 
5.
An excellent night of partying
Person 1: What did you do on friday night?
Person 2: We had an awesome hootenanny in town.
by Alex and Rob March 03, 2003
 
6.
Southwestern slang for party.
Texas Pete: Wanna come to Six-Gun Pete's hootenanny tonight?

Maryland Frank: No, thank you. I have a term paper to write. Plus, I think that mass congregations of rednecks should be outlawed.
by Skinny Skin May 25, 2004
 
7.
vagina.
Check out her hootenanny.
by handmethathootenanny October 19, 2011