Phrase added after a comment to makesomething completely unsexual sound sexual and usually humerus. Derived from the phrase "thats what she said" and works similar.
"once I finish up with him, I'll get started on you"
"thats what I said"
A terribly dull planet in the novel "Mostly Harmless", the 5th installment of the "Hitchhiker's Guide to the Galaxy". The planet exists in an alternate demonsion in the location where eart should be and is ahted by all of it's residence.