N-COUNT 废马屠夫（买下老马并将其屠宰以获取其肉、骨、皮的人） A knacker is someone who buys up old horses and then kills them for their meat, bones, or leather. 废马屠夫（买下老马并将其屠宰以获取其肉、骨、皮的人） [British, informal]
Her horse was a show jumper whom the family rescued from the knacker's yard.