blurt!, excl. — Green’s Dictionary of Slang

blurt! excl.

[SE blurt, to make a contemptuous puffing gesture with the lips, to puff in scorn]

a general excl. of disdain.

1604		Marston Malcontent I iii: Blurt o’ rhyme!, blurt o’ rhyme! Maquerelle is a cunning bawd.
1611		L. Barry Ram-Alley I i: Blurt maister gunner, your linstocks too short.
1822		R. Nares Gloss. (1888) I 88: blurt. An interjection of contempt.