tic-tac
Ⅰ
noun
1
a person who signals betting information by tick-tack UK, 1990.
2
a fact. Rhyming slang, from the race track signalling system UK, 1992.
3
phencyclidine, the recreational drug known as PCP or angel dust US, 1994
Ⅱ ⇨ tick-tack; tic-tac
1. noun
1
a system of hand signalling used by racecourse bookmakers UK, 1899.
2
a signal of any kind. From race track use UK, 1992
2. verb
to signal betting information by tick-tack AUSTRALIA, 1956