A dermot sullivan is a tasty chocolate bar made from chocolate and caramel. It tastes so good that you just want to have it all day.
wow this Dermot sullivan is so good, it's also sexual.
by thats not my name September 3, 2008
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19th Century British opera composers. Their songs are catchy and absolutely hilarious. Their operas are essentially the ultimate FRAT music.

Gilbert and Sullivan wrote many great operas including HMS Pinafore, Mikado, and Pirates of Penzance.
by nirvanarageatm May 9, 2006
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1. a weird person who is gorgeous and fun
2. loves nerdy things
3.chooses the best friends
Brittany- your a great friend Jane.

Jane- Thanks

Brittany- No I mean literally your a Brooke Sullivan
by brooksflow13 September 25, 2014
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The prettiest,smartest girl in school. Lets just say, she's a catch!
1:yo I just met this amazing girl
2: aww what was she like
1: Lets just say we have an Olivia Sullivan on our hands
2:Lucky u
by baenessness April 20, 2016
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(verb and/or noun) :: the act of freaking out to the most littlest details - accompanied with a tweak in the whole face and body, pointing and viscously shaking the finger, and shrugging the shoulders whilst simultaneously exclaiming "oi!" - especially after just having asked to "define" something or stated something annoying of the sorts.

*Disclaimer :: not recommended to drink or blaze with someone who pulls a sullivan.
Guy1 :: ay sullivan, its your turn for a drunken hook-up!

The Sullivan :: (air quoting) define "drunken hook-up" - accompanied by the acts stated above.

Chick1 :: dude whyy the fuuucckkkkkkk would you ask that aldsuscoivalksndflakwerhjoicuf angry angry yer such an annoying little bottomhead sully!!!!!!
by natatatatatatat April 19, 2009
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