Webster's Revised Unabridged Dictionary · 1913

Ticktack

Ticktack , noun

[See Tick to beat, to pat, and (for sense 2) compare Tricktrack.]

1.
A noise like that made by a clock or a watch.
2.
A kind of backgammon played both with men and pegs; tricktrack.
A game at ticktack with words. — Milton

Ticktack , adverb

With a ticking noise, like that of a watch.