strop

noun

1. A strap; more specifically a piece of leather or a substitute (notably canvas), or strip of wood covered with a suitable material, for honing a razor.

   “Cheap razors are a mistake, as they soon lose their edge. A good razor requires no strop. It has been suggested as an excellent plan to have a case of seven razors—one for each day in the week—so that they are all equally used.”

2. A piece of rope spliced into a circular wreath, and put round a block for hanging it.
3. (Commonwealth, Ireland, UK)A bad mood or temper. A tantrum.
4. (slang)A poor-quality or unsaleable diamond.

   “[…] he almost fell out of the phone booth laughing and said to her, 'Boy, did my son buy a strop! Did he get stuck!'”

verb

1. To hone (a razor or knife) with a strop.

   “One should strop the razor before each shave.”

   “The barber—a round, bustling fellow—stropped his razor and prattled gossip.”

2. (obsolete)To strap.
3. To mark a sequence of letters syntactically as having a special property, such as being a keyword, e.g. by enclosing in apostrophes as in 'foo' or writing in uppercase as in FOO.