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1.
(Noun) - Having intercourse/hooking up with a generally young, attractive teacher. A 'Fitz and Aria' is generally on accident, and not meant in a creepy way. (The teacher is not a perv, just in love with the wrong person.)

Based off of the ABC Family TV Series, "Pretty Little Liars." Mr. Fitz and Aria hook up and later find out that he is her new teacher.
L- "Do you see how Mr. C looks at Stacey?"

R- "Yeah, they're totally pulling off a Fitz and Aria."

L- "That's hot."
by Cats_Dont_Dance July 23, 2011