a long open box that horses and cows can eat from 马槽；牛槽；饲料槽 Word OriginMiddle English: from Old French mangeure, based on Latin manducat- ‘chewed’, from the verb manducare, from manduco ‘guzzler’, from mandere ‘to chew’.
Idioms
a dog in the manger
a person who stops other people from enjoying what he or she cannot use or does not want 占马槽的狗