[f. CHOP v.3] A snap with the jaws or mouth. (Quot. 1693 may belong to CHOP sb.1)

1

a. 1653.  G. Daniel, Idyll, v. 160. Give a double Choppe On the Mouth-fitting Vowel.

2

1693.  Evelyn, De la Quint. Compl. Gard., I. 124. [An apple that] requires to be Eaten greedily, and at a chop; that is to say, without Ceremony, and with its Coat all on.

3

1865.  Dickens, Mut. Fr., II. 298. ‘No’ said Miss Wren, with a chop.

4