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1.
Used to describe a person who is fascinated by Rebecca Black or addicted to her viral hit-song "Friday". The phrase is like how "Bieber Fever" is to Justin Bieber.
Jake blasted the song "Friday" from his phone in front of the whole class, infecting the students with the Rebecca Black Plague.
by DJMattDaCoolCat March 24, 2011
 
2.
americas answer to the Bieber Fever.

a disease contracted when a person hears Friday by Rebecca Black and can not get the annoying, badly sung, and badly written song out of their head.
That dumb song, Friday by Rebecca Black, is stuck in my head. I think i caught the Rebecca Black Plague!
by graciebeelove April 10, 2011