Phrase used to describe how legitimatesomething is. It's so legit that you have to rhyme. The phrase can also be slurred so that it's more like "lah-gittay tittayy". This phrase is usually used by a cray girl named Georgia.
"Legitty titty, I am so tired."
"La-gittay tittay, she is so cray."
"Legitty tittay, that party was shitittay."