The American Heritage® Dictionary of the English Language, 4th Edition
n. One who lives in or close to a swamp.
n. One who clears a swamp or forest.
n. A helper, as in a restaurant.
n. A truck driver's assistant.
The Century Dictionary and Cyclopedia
n. One engaged in breaking out roads for lumberers, or clearing away underbrush, especially in swamps; one who cuts trees in a swamp.
Word Usage
"As a "swamper" -- one who loads heavy crates of grapes for hours at a time -- Carrillo was paid according to how much product he was able to move in a day, not how many hours he worked."