Green’s Dictionary of Slang

beg n.

(UK black) a girl in obvious need of male attention; a needy individual.

hubpages.com ‘Roadman Slang 10 Jan. 🌐 Beg - a desperate girl who is always on the look out for males’ attention.
[UK]T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Beg – sycophantic, obsequious individual, cadger.

In phrases

cash a beg (also cop a beg)

(US black) to obtain alms, a handout.

[US]Ted Yates This Is New York 5 Apr. [synd. col.] The perfomers would still be prowling the street [...] trying to cash a beg.
D. Burley N.Y. Amsterdam Star-News 21 June 13: A Homey copping a beg for a scarf on the cuff.