when your trying to get out of a conversation
She's always on top of me. That's what she said!
To refer to sex if somebody uses a term relating to it
"My ass hurts".
"That's what she said"
The greatest dirty joke of all time
* Guy sees a table *
Guy says: "Wowww it's (the table) soo biggg!"
Me: "That's what she said!"
An even grittier form of "That's what she said", implying the statement was said during a sexual encounter the night before.
Ted: Holy shit that thing is huge.
Jon: That's what she said last night
I know what I said. Why I said it is more important. I'm never going to feel bad about it because your lives stopped mattering the second she fucked that mongoloid.
Hym "I said what I said. Outside of emergency money you all are a detriment to my existence. Hey, what do you think is the best way to cook brains? Like... Scrabbled eggs? Meat loaf? Probably meat loaf, right?"