(n.) The condition of having one's back ache, as a result of arching the lower spine inward in order to achieve the look of a larger butt while twerking
White Girl #1-OMG I have a bad case of Twerker's Back from the club last night. My butt looked to small and bony so I kept trying to bump it out.
White Girl #2-IKR same! I need to take a day off from work today...