look up any word, like half chub:
 
3.
Used with a hashtag (#) on Twitter to tag Twitter gangbangs. Twangbang is a group of three Tweeple, M/F/M, sharing cyber sexual public Tweets i.e., engaging in group cyber sex via Twitter. Twangbang posts are properly tagged #twangbang. Often associated with #swingers.

If the number of people engaged in Twex is four or more, it is properly tagged #Tworgy. If the number of Tweeple is three and they are F/M/F, it is tagged #Tweesome. If the number of people engaged is just two, it is simply Twex.
As used in a Tweet:

Posted by User1:
OMG I had the best #twex last night. Me and @user2 with this chick, @user3.

Posted by User69:
@user1 Dude that wasn't #twex, you moron, that was a freaking #twangbang.
by twittertwat June 17, 2009
 
1.
to have sex with a Southerner(person who lives in the South-Eastern part of the United States)
a girl came down from New York to a concert in Mississippi and ended up having sex with a local guy. When she got home she said to her friends, "Damn, you need to go down South and have a Twang-bang, it blew my mind."
by irate April 09, 2014
 
2.
A country and western shagfest.
Tammy went to Nashville knowing she'd have to twangbang the staff at Horseshoe Records, Inc. in order to have her demo heard.
by harry flashman July 12, 2003
 
4.
Anyone with a distinct foetal obsession.
for god sake woman! clear it up!
by Geraldine the Cabbage May 02, 2003