nullo UK /ˈnʌ.ləʊ/US /ˈnʌ.loʊ/ noun2 •A bid in which the bidder asserts that he or she will not take any tricks.It takes a better nullo hand to raise nullos than to bid them. Dummy shows. A player who has once been called off from nullos by his partner should never return to them. — 1916 •One who has their genitals (and sometimes nipples) surgically removed (nullification) as a form of body modification. formsnullos