doormat

noun2

1. •
   A coarse mat at the entrance to a house, upon which one wipes one's shoes.

   • Wipe your shoes on the doormat before you start plodding around in the house.
2. •
   (figurative) Someone who habitually yields to others' demands or mistreatment, failing to assert their own rights or interests.

   • He's such a doormat, he lets everyone walk all over him.