The piece of string that hangs from your lady's baby area, when a tampon is inserted
"hey hunny, your Twatdangle is showing in your tights"
Absurd stunt involving David Blaine hanging upside-down above a NYC ice-rink for a couple of minutes, duly extended to mean any publicity-grabbing gig exposing the protagonist as a complete "twatdangle".
From Old English "Twattendang", from the Viking "Twtdnglersk", meaning to hang from the rigging of a longship in an attempt to impress your shipmates.
"Hey, did you see the upside-down David Blain thing? That was like so cool."
"Nah, the guy came down after two minutes for a piss. It was a total twatdangle."
The act of being David Blaine and hanging upside down.
Jim: Hear about David Blaine?
Sally: Oh, the guy thats being a twatdangle in New York?
To hold someone who is being a twat by the ankles and dangle him/her out the window or over the stairs until they promise not to be a twat any more.
We twatdangled the cleaner over the balcony until he promissed not to unplug the server to plug his vacuum cleaner in again.