Be sure to wipe your dirty feet on the 'mat' [='doormat'] before you enter the house.
She'll 'go to the mat for' you. [=she will do everything she can to help you]
The family 'rolled out the welcome mat' for the new exchange student.
(..) This mentoring is very... ...tax and stuff. Can you pass the marmalade? That is mahogany. Look at you! Just killed a... place mat! You really wanna know how to stay alive? You get people to like you. Oh! Not what you're expecting. (..)2012 The Hunger Games