slack suit

English Thesaurus

1. casual dress consisting of slacks and matching jacket (noun.artifact)

hypernym	:	suit, suit of clothes,
definition	:	a set of garments (usually including a jacket and trousers or skirt) for outerwear all of the same fabric and color (noun.artifact)

hyponym	:	pants suit, pantsuit,
definition	:	a pair of pants and a matching jacket worn by women (noun.artifact)