A poorly made up portmanteau word. It's made up from "twitter - party". A twarty usually needs a theme. It's where people, erm, "hang out" on twitter and tweet mostly about the said theme.
For one thing, you can tweet your questions and the twarty's host will answer them. The good thing is, it'a a lot harder to feel awkward in a twarty, and you can easily twarty hard.
However, the word twarty, is well and truely awkawrd and lame.
Example 1:
#Nick: You been to the Ugly Americans twarty ?
#Deepika: Dude, Ugly Americans is a great show, But a twarty? Come on.
Thomas: "I believe Richard had a Boston T Party at work yesterday."
Richard: "Yes, I scheduled it for 3pm."
Harrison: "For the record, I did not participate."
"William, did you supervise a Boston T Party? I wish you would invite more people! I feel like we've lost something."
"Patrick, you know that I can make right with what I left behind."
"William, you are such a cock tease!"
Stacey avoided the unisex public bathrooms since hearing of George Michael and his infamous Boston T party.