Emily Dickinson Lexicon

BON'NY-CLAB-BER, n. [Qu. bonny, or Ir. baine, milk, and clabber; Ar. لبا laba, biestings; G. lab; D. leb, rennet.]

A word used in Ireland for sour buttermilk. – Johnson. It is used, in America, for any milk that is turned or become thick in the process of souring, and applied only to that part which is thick.