What is Titular?
1.
A titular role is a role in which the character says the title of the movie or play or book.
In the movie Out of Africa, when Robert Redford is teaching Meryl Streep how to drive, and there is all this traffic and this man drives up beside them and says, "Aww boy, Im just so tired of all this traffic, I can't wait until I get out of Africa.
Or
In the movie Starwars, when that Raiders of the Lost Ark guy is teaching Luke how to drive. He's teaching Luke how to drive the thing, and they are in the back messing with the feathers, and this stowe-away walks by and says, "Aww boy, Im just so tired of all these star wars."
The man who says these lines has the title line, and the titular line.
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2.
Adjective form of "title."
A young Keanu Reeves made his stage debut starring as Oliver!'s titular character.
The above is no fact. It is merely written out for example's sake.
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3.
It used to mean "relating to a title", but now the word is mainly slang for 'a busty woman'. The 'tit' part of the word of course referring to the tits, and the 'ular' part of the word emphasizing the tit part, so the common definition of the word relates to a busty chick.
However, most people who use the word this way are in the advertising business, advertising the female main character of a title as having big tits. They think it makes them witty or something.
Old Usage: 'BloodRanye' is both the name of the movie and the main character, so BloodRayne is the titular character.
Current Usage: Damn, BloodRayne is titular...check out dat rack.
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4.
A predominately male expression derived from their fascination with breasts. Use as a slang term to describe something which is 'cool'.
"Dude! That's just titular!"
"Titular, just titular! It couldn't BE more titular!"
