(US, dated) A container used for urinating or defecating when it is not possible or convenient to use a bathroom or toilet; a bedpan, a chamber pot. Commonly used in hospitals, where it is normally called bedpan. Formerly used in private residences that were without an indoor toilet or bathroom.
1985, The Color Purple (film), 01:58:40"All you fit to do is be Shug's maid... Take out her slop jar, maybe cook her food. You ain't even that good a cook."
