Meaning

noun cleaning implement consisting of absorbent material fastened to a handle; for cleaning floors

verb to wash or wipe with or as if with a mop

verb make a sad face and thrust out one's lower lip

originFrom Middle English mappe (also as mappel), perhaps borrowed from Walloon mappe (“napkin”), from Latin mappa (“napkin, cloth”). Believed to be from a Semitic source, variously claimed as Phoenician or Punic (the latter by Quintilian). Compare Modern Hebrew מַפָּה (mapá, “a map; a cloth”) (shortened from מַנְפָּה (manpah, “fluttering banner, streaming cloth”)). Doublet of map, nape, and nappe.

Etymology from Wiktionary, CC BY-SA 3.0