Slaughterhouse waste is a biodegradable waste with the following definition: Animal body parts cut off in the preparation of carcasses for use as food. This waste can come from several sources, including slaughterhouses, restaurants, stores and farms(source:OED).
In the UK, slaughterhouse waste is classed as category 3 risk waste in the Animal By-Products Regulations, with the exception of condemned meat which is classed as category 2 risk.
Abattoir is another word for Slaughterhouse.