mustache

noun2

1. •
   A growth of facial hair between the nose and the upper lip.

   • A moment later there entered a tall thin Englishman with a great moustache, which was a rare thing amid that clean-shaven race. — 1903
2. •
   (informal) A curly bracket, { or }.

   • In this example, the first is a string of text that contains the name property in double curly brackets (or “mustaches”)—this is the syntax for a tag. — 2013