An oblivious, ignorant, foolish girl. One who does not consider others.
Girl #1: "I only care about a few people in the world!!!" evil cackle.

Girl #2: OMG, she just pulled a 'Kelsey.'
by The Alarmer February 06, 2013
known as the Flushing whore. Askanyone from Flushing and they will say...I heard she's Fucked everyone at the school including middle schoolers, or I hear she's pregnant again...oh wait she's prob lying like usual.
dude you know Kelsey r?

yeah dude, she's Fucked my older and younger brother..she nasty!
by yourface2100 May 10, 2012
A kelsey is somone who may appear to be nice on first meet but that will all come back and bite you in the ass! she is a fishy reject who needs a life and a pal who dont look like a whale...
man: whoa did u see that girl back there??

other man: yh shes a right kelsey...
by greenfrogs January 07, 2012
When someone initiates a conversation with the opposite gender and claims to others that the person they talked to actually started it and wouldn't shut up in order to avoid sounding desperate. usually occurs when a younger girl talks to an older guy
wow, she totally pulled a kelsey on you
by partyhardy09876 June 14, 2011
A horrible, ugly, poser person usually fat. Weird eyes and big teeth. Ugly laugh.
person: Ugh, kelsey thinks she's such a NERD.
you: I know, I wish she'd commit to her claims of being suicidal and do it already.
by Harikar October 09, 2013
A sloppy whore. Generally tries to fuck every guy in the room at once. She's a stupid little bitch that likes "meat". If you have alcohol, you can get this slut. She loves to party and get shitfaced. Shes been fucked so many times she is the most loose girl EVER!
Guy 1 "Dude, Kelsey's vagina is so imminence that you can fit the whole U.S. Navy inside her!"

Guy 2 "Yea, all those semen!"
by Big Jeff22334455 July 18, 2011
Psycho Bitch that has no real friends. She cant be trusted and made her only friends miserable with her snide comments and judgements and eventually drives them away. She isnt confident about herself, which is why she constantly brags about what little she has and insults her friends. She couldnt get a guy unless he was a man whore. Shes an awful person who is rudely inconsiderate and competitive. She never wins at anything, so basically a Kelsey is a failure at life. If you meet a Kelsey just walk away and save yourself the trouble and the drama...
Oh thats just like her, shes such a Kelsey!
by loyallove13 May 08, 2011

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