tic tac
adj1
Colloquial fussy, petty
tic-tac
nounalso spelled tic-tac1
UK A system of sign language used by bookmakers at racecourses to communicate odds and bets; an associated group of words for each sign.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — authors: page histories for tic-tac and tic tac.