One who sends pictures of his/her own genitalia to others via social media, most commonly over Twitter.
That tweiner sent pics of his junk that would make a fantastic ad for those little sausages people put out as holiday party treats
by Russ68 June 16, 2011
by Hue Gwang September 13, 2006
by Lucylou May 16, 2007
Applies as a nickname to a male with a penis that bends to one side, or is not straight when erect. This term is especially useful for any of your friends with the name "Ben," where "tweiner" follows as their make-believe last name. It yields a hilarious nickname that sounds just like "bent weiner."
I heard through the grapevine that you've got a tweiner!
or
Friend: Sup' Tweiner?
Ben: Shut up, ass-hole.
or
Friend: Sup' Tweiner?
Ben: Shut up, ass-hole.
by Coffee February 24, 2005
by Camp Louis June 16, 2008