Akademik

system of signalling by hand signs used by bookmakers at racetracks

make a sound like a clock or a timer

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the clocks were ticking

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the grandfather clock beat midnight

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Something ——s

/tik"tak'/, n.

1. a repetitive sound, as of ticking, tapping, knocking, or clicking: the ticktack of high heels in the corridor.

2. a device for making a tapping sound, as against a window or door in playing a practical joke.

3. to make a repeated ticking or tapping sound: Sleet ticktacked against the window panes.

Also, tictac.

[1540-50; imit. See TICK¹]