tiepin

[ tahy-pin ]
/ ˈtaɪˌpɪn /

noun

a straight pin, usually with an ornamented head and a small metal sheath for its point, for holding together the ends of a necktie or to pin them to a shirt front.
Also called scarfpin.

Origin of tiepin

First recorded in 1770–80; tie + pin

British Dictionary definitions for tiepin

tiepin
/ (ˈtaɪˌpɪn) /

noun

an ornamental pin of various shapes used to pin the two ends of a tie to a shirt