Green’s Dictionary of Slang

1. (Irish) a cruel, selfish woman.

1910		P.W. Joyce Eng. As We Speak It In Ireland.
1997		Share Slanguage.

2. a large, energetic woman [orig. Yorks. dial.].

1922		D.H. Lawrence Aaron’s Rod 33: She too was a tall stag of a thing, but she sat bunched up like a witch .
1922		Joyce Ulysses 425: The likes of her! Stag that one is. Stubborn as a mule!