look up any word, like dirty sanchez:
 
1.
Also known as PRB. The world as it is today. After Rebecca Black unleashed the horror that is "Friday" a new calendar system was called into effect, to show a distinction between the world as it was, and the world as it is today. The main difference being marked by the incessant singing and re-singing of the words "It's Friday, friday" every time said day is mentioned.
We are now living in the year 0 Post Rebecca Black. (PRB)
by veronicasawyersmokes June 12, 2011