underbred

1. They plainly did not know how to treat me, but behaved like persons who are underbred.
   他们简直不知道怎样处置我，但是其行为却像缺乏教养的人。
2. We are underbred and low-lived and illiterate;
   我们是愚昧无知、不学无术的文盲；

adj

1. of inferior or mixed breed
   1. an underbred dog

2. (of persons) lacking in refinement or grace

   Synonym:    ill-bredbounderishlowbredrudeyokelish