Work doormat
Somebody who gets completely walked all over at work. They work over-time for free and they don't stand their ground at all.
Alice: What you up to tonight bae?
James: I'm on call tonight AGAIN!
Alice: But they don't even pay you for that?! You're such a work doormat!!
James: I'm on call tonight AGAIN!
Alice: But they don't even pay you for that?! You're such a work doormat!!