Definition of "yegg"

She was frankly disappointed. For some reason she had thought to discover a burglar of one or another accepted type—either a dashing cracksman in full-blown evening dress, lithe, polished, pantherish, or a common yegg, a red-eyed, unshaven burly brute in the rags and tatters of a tramp.

1914, Louis Joseph Vance, “Accessary after the Fact”, in Nobody, New York, N.Y.: George H[enry] Doran Company, published 1915, page 51

‘These racketeers are a new type. We think about them the way we think about old time yeggs or needled-up punks.’

1940, Raymond Chandler, Farewell, My Lovely, Penguin, published 2010, page 265

The bookmakers were yegged as they left the track in the era of the hand-books.

1956, Ian Fleming, chapter 10, in Diamonds Are Forever