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The art of listening or watching, memorising Katy Perry performances, videos and lyrics.

This could be in an obsessive fashion, or hardcore girl fan style.

This could also mean someone who is completely obsessed or deluded with Katy Perry in every way and is constantly needing to get their 'KP' fix, this is known as Katy Perrying.
Person 1: "Hey dude, wanna hang out today?"
Person 2: "No sorry, I'm Katy Perrying all day"
Person 1: "WTF, that stupid bitch who can't sing and has big tits?"
Person 2: "STFU.... *starts crying*
by Jackula August 20, 2009
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