strop
From Longman Dictionary of Contemporary Englishstropstrop /strɒp $ strɑːp/ noun [countable] 1 DCBa narrow piece of leather used for making a razor sharp2 → in a stropExamples from the Corpusstrop• The two schools shared some equipment and services, including the razor strop used to discipline students.Origin strop Old English “leather band for tying an oar”, from Latin struppus “band, strap”, from Greek strophos “twisted band”