Dictionary
slave' la'bor
1. persons, esp. a large group, performing labor under duress or threats, as prisoners in a concentration camp; a labor force of slaves or slavelike prisoners.
2. labor done by slaves.
3. any coerced or poorly remunerated work:
Typing at that salary is slave labor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.