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the effect of a random song playing in your head for no reason, often followed by another song completely unrelated to the first, much like a jukebox on random
Guy 1:Why the hell was Rick Astley just playing in my head? I haven't heard any of his songs for ages! I had Slayer playing before that! Wtf!?

Guy 2: Mental jukebox mate
by TomD4Eva March 05, 2012
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