MOP, noun [Latin mappa.] A piece of cloth, or a collection of thrums or coarse yarn fastened to a handle and used for cleaning floors. 1. A wry mouth. [Not used.] MOP, verb transitive To rub or wipe with a mop MOP, verb intransitive To make a wry mouth. [Not used.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI