pants
plural noun
1 British
underpants, briefs, boxer shorts, boxers, long johns, bikini briefs;
G-string, thong;
British knickers, Y-fronts, tanga briefs, French knickers, camiknickers;
North American shorts, undershorts;
informal panties, undies, frillies;
British, informal kecks, smalls;
Canadian, informal gotch, gotchies;
dated drawers, bloomers;
North American, dated step-ins;
historical pantalettes, Directoire drawers.
pants Oxford Dictionary of English