Short for that's what she said. Only to be used in situations where saying that's what she said would be deemed inappropriate. Usually said under breath and pronounced twiss.
(At formal dinner party with in-laws)
Mother-in law: We were fishing when your father pulled out a giant rod I had never seen before...
(Silently, under breathe): TWSS..
A chat term, and an abbreviation for "that's what she said." Commonly used when oneperson says something that could be misconstrued as a double entendre.
Thats what she said. This sentence is often used in situations where adding this sentence would make the conversation real funny and even change the topic altogether!
Example:
John, while putting the bait on his fishing rod: Whoa! This worm is BIG!
Peter: Thats what she said! (Or in texting, TWSS)
Example 2:
After the quick magic show, John says," That was quick"
Peter: Thats what she said!
Example 3:
John: You are a pain in the butt.
Peter: Thats what she said!