step-in
step-in ▶adjective [ attrib. ] denoting a garment or pair of shoes that is put on by being stepped into and has no need for fasteners. ▶noun (step-ins ) 1 a pair of such shoes; slip-ons. 2 dated a pair of women's panties.
step-in |ˈstɛpɪn | ▶adjective [ attrib. ] denoting a garment or pair of shoes that is put on by being stepped into and has no need for fastenings. ▶noun (step-ins ) 1 a pair of step-in shoes; slip-ons. 2 dated, chiefly N. Amer. a pair of women's briefs.