Green’s Dictionary of Slang

(US) a young woman, with overtones of sexual precocity; thus beasel hound n., a man who pursues such girls.

1922		Appleton Post-Crescent (WI) 28 Apr. 17/4: beasel – A flapper slightly more advanced than a flapper. [...] beasel hound – A girl chaser.
1926		Judge (NY) 91 July-Dec. 31: Beazle - see Flamper.
1932		Wodehouse Hot Water 21: ‘Seems to me sometimes, the squarer a guy is with beazels, the worse they treat him’.