It’s not clean - debriding an abscessed bowel is about the grossest dirtiest job I can think of. It can be very physical, particularly when working with bone.
Those are the two criteria, the idea being that a white shirt (collar) would be ruined. Obviously, it’s not just a synonym for unskilled work, or OP’s question wouldn’t even make sense.
Surgeon? Yes. House painter? Probably not.
In what world is a surgeon blue-collar? Certainly not this one.
It’s not clean - debriding an abscessed bowel is about the grossest dirtiest job I can think of. It can be very physical, particularly when working with bone.
Those are the two criteria, the idea being that a white shirt (collar) would be ruined. Obviously, it’s not just a synonym for unskilled work, or OP’s question wouldn’t even make sense.