int. An exclamation expressing impatience, dissent, or the like.
1859. Geo. Eliot, A. Bede, ii. ‘Tchu!’ said Ben,… ‘what’s folks’s kin got to do wi’t? Not a chip.’ Ibid. (1861), Silas M., vii. ‘Tchuh!,’ said the farrier. And then he asked,… ‘How much money might there be in the bags, Master Marner?’
