step-in
Concise Oxford English Dictionary © 2008 Oxford University Press:
step-in/ˈstɛpɪn/
▶adjective 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 such shoes; slip-ons.
- 2 dated, chiefly N. Amer. a pair of women's briefs.
'step-in' also found in these Oxford entries:

