[Etymology unknown: connection with the prec. is not very likely. Cf. BUNNY.] A name given sportively a. to the squirrel. b. to the rabbit (dial.). c. Also used as a term of endearment.
1587. Churchyard, Worth. Wales (1876), 57. Her Squirrell lept away she sought to stay The little pretie Bun.
c. 1614. Drayton, Moon Calf, Wks. (1748), 178. She was wont to call him her pretty bun.
184778. Halliw., Bun, a rabbit. Var. dial.
1857. Emerson, Poems, 155. The mountain and the squirrel Had a quarrel; And the former called the latter Little Prig; Bun replied, You are doubtless very big.