Sweat"er (?), n.
1.
One who sweats.
2.
One who, or that which, causes to sweat; as:
- A sudorific.
- A woolen jacket or jersey worn by athletes.
- An employer who oppresses his workmen by paying low wages.
[Slang]
<-- jersey worn by lots of people, not just athletes. Needs expansion. -->
© Webster 1913.