Community diaper

The low man on the totem pole. The person, who because of their status or ineptitude, is accustomed to taking other people's shit and being routinely pissed on.

Boss man: "Hey everyone, let me introduce you to the new community diaper, Tom! He' s gonna be filling in for Sarah while she's away for the next few months, so feel free to shit on him just like you would her!"

Tom: "hi, I'm Tom.........."