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!"
When you use her intimate juices to lube up your jerky before putting on the rubber. (troj)
Yes, this is Timothy, I'll have what she's having, besides the kids.