American & British: Something of poor quality,a bad situation or being unlucky.
I bought myself a new microphone for my computer thinking it would improve my voice quality when talking to my friends online, as it turn out it was "Bonescum"
I had to sell my car as i needed the cash as i had lost my job!.."Bonescum"
I had to have a route canel done at the dentist today gonna cost money!!.."bonescum"