Home › Words › U › underbossunderbossunderboss means an assistant to the boss of a crime family.Among words judged in Lexicurio's Arena, underboss ranks #16,765 of 42,785 for Qualifying.EtymologyFrom under- + boss, calque from Italian sotto capo.nounAn assistant to the boss of a crime familye.g.“An alleged "underboss" of the Bonanno family, Carmine Galante, has been sentenced to 20 years in prison […]” — 1965 January 6, Peter Kihss, “1,500 in 5 Crime 'Families' Identified”, in New York Times:Definitions & examples from Wiktionary (CC BY-SA 3.0).