subs. phr. (old).Sour buttermilk: but see quots. (B. E.) [NARES: an Irish term].
1630. JONSON, The New Inn, i. 1. To drink such balderdash, or BONNY-CLABBER.
1633. HARINGTON, Epigrams, Of the warres in Ireland.
| That war is sweet, to those that haue not tryd it: | |
| For I have proud it now, and plainely seet, | |
| It is so sweet, it maketh all things sweet. | |
| At home Canarie wines and Greeke grow lothsome: | |
| Here milke is Nectar, water tasteth toothsome. | |
| There without bakt, rost, boyld, it is no cheere. | |
| Bisket we like, and BONNY CLABO heere. | 
1634. FORD, Perkin Warbeck, iii., 2. The healths in usquebaugh, and BONNY-CLABBORE.
1688. RANDLE HOLME, Academy of Armoury, 173. BONICLATTER, cream gone thick; and in another place, BONI THLOBBER is good milk gone thick.