intj. (old).An exclamation of contempt or derision. Hence (proverbial), BAW-WAW, QUOTH BAGSHAW (the lie direct). As adj. = contemptibly noisy.
1570. P. LEVINS, Manipulus Vocabulorum, s.v.
1599. NASHE, Lenten Stuffe (Harleian Miscellany), VI. 174. All this may passe in the queenes peace, and no man say bo to it; but BAWWAW, QUOTH BAGSHAWto that which drawlacheth behinde, of the first taking of herrings there.
c. 1600. Dist. Emp., s.v.