Definition of "dunny"

I were skynnes of conny, / That causeth I loke so donny.I wear skins of cony [rabbit], / That cause me to look so dunny.

c. 1517 (date written; published c. 1545), John Skelton, “Here after Foloweth the Booke Called Elynour Rummynge. The Tunnyng of Elynour Rummyng per Skelton Laureat.”, in Alexander Dyce, editor, The Poetical Works of John Skelton: […], volume I, London: Thomas Rodd, […], published 1843, page 108, lines 399–400

Dunny, somewhat deaf, deafish.

1708, J. Kersey, Dictionary Anglo-Britannicum

What the devil are you dunny? won't you give me no answer?

a. 1791, F. Grose, Olio, p. 105

Should a School-boy do so, he'd be whip'd for a Dunny.

1709, British Apollo, Vol. II, No. 29, p. 3

There was one leaning dunny down the back and, if you stayed very quiet, on a very still day you could hear the white ants as they chewed the wood.The bottom boards were already eaten through, and I avoided using the dunny at all costs.

2008, Judith L. McNeil, No One's Child‎, page 95

‘Until you wake up to yourself, you can live in the old dunny for all I care.’‘All right, I will,’ said Tony.

2010, Christopher Milne, “The Boy Who Lived in a Dunny”, in The Day Our Teacher Went Mad and Other Naughty Stories for Good Boys and Girls, page 108

The dunny was another place to go to get out of class. You got to go there by raising your hand in class and asking Miss if you could go to the lav.

2010, Kathleen M. McGinley, Out of the Daydream‎, page 47