Meaning

noun a woman who cohabits with an important man

originPerhaps from Middle Dutch *doketje, diminutive of Middle Dutch docke (“a doll”), from Proto-Germanic *dokko (“something round”), related to *dukkǭ (“muscle, strength”). Cognate with Low German dokke (“doll”), Saterland Frisian dok, dokke (“a doll”), Swedish docka (“doll, puppet”).

Etymology from Wiktionary, CC BY-SA 3.0