Wiktionary
slop-basin
n. (context dated English) A container used for urinating or defecating when it is not possible or inconvenient to go to a bathroom or toilet; a bedpan, a chamber pot. Commonly used in hospitals, where it is normally called bedpan. Formerly used in private residences, particularly those without an indoor toilet or bathroom.
Usage examples of "slop-basin".
A tempest in a slop-basin is absurd We will reserve that sort of thing for the mighty ocean and the lonely midnight.