When someone responds K to a very important/serious problem of yours. The bitchy K also signifes that the person does not care about you or your problem that much at that point of time.
Text conversation between Miranda and Anne.

Miranda: Omg i dont know if i should go to Lana's party. No one i like is gonna be there, but I'm one of Lana's best friends. You have to come with me
Anne: K.
Miranda: Dont give me the bitchy K! This is a serious situation!!!
by Monique Lester July 24, 2014
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