1567 Edinb. Test. I. f. 19, in (at cited word) Thre naig horsis price of the pece aucht pundis.
1816 48 239 A fall of 50l. per cent. has taken place in nag and hack horses.
a1864 J. Clare (1989) I. 71 When he came to where they lay at night No nag-horse Dobbin ne'er appear'd in sight.