(~s)
1.
A ~ is a mat by a door which people can wipe their shoes on when they enter a house or building.
N-COUNT
2.
If you say that someone is a ~, you are criticizing them because they let other people treat them badly, and do not complain or defend themselves when they are being treated unfairly. (INFORMAL)
If you always give in to others you will end up feeling like a ~.
N-COUNT disapproval