slipsole
/ˈslɪpsəʊl/Definitions
1. noun
The part of a shoe or sandal that covers the heel and back of the foot, typically consisting of a strap or lacing that secures it in place.
“She struggled to adjust the straps on her slipsole, but it kept coming undone.”
2. noun
A type of shoe, especially a casual or athletic one, characterized by a slipsole design.
“He wore a pair of slipsoles for hiking in the mountains.”