When horny and/or drunk and you have a sudden urge to have sexual relations with a random whore. This whore will never reject you and let you and your homies that your with hit it in as many different ways as you would like. Basically, it's a booty call that will never ever go wrong.
Guy 1:"Bro, im so messed up right now! And im horny as hell too!"
Guy 2: Hey dude, why don't you just do a kasey callup and get your dick wet? You know she's down brah!"
Guy 1: "Good Idea!"
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