(n) :a kelsey is a being of strong mannerism. kelsey's are scrappy and take no shit off anyone, they will fight on sandbars, attack boyfriends, and yell furiously if provoked. kelsey's have been known to carry herpies, although not all kelsey's do.
like omg that redneck girl who's top fell off... she's such a kelsey.
omg... you hooked up with like 7 guys last night- you kelsey.