n
1 mat placed near a door, for wiping dirt from one's shoes （置于门前的）蹭鞋垫.
2 (fig infml 比喻, 口) person who allows others to treat him without respect 逆来顺受的人
*Stand up for yourself a bit don't be such a doormat! 长点骨气吧--别老这么忍着任人践踏!

n[C]
a piece of material inside or outside a door for you to clean your shoes on
informal someone who lets other people treat them badly and never complains
　Don't let him treat you like a doormat .