magsman
nounEtymology From mag + -s- + man, of unclear origin. It has been suggested that mag was dialect for halfpenny or for prattle.
1
Archaic A con man who tries to deceive members of the public.
- […] M was a Magsman, frequenting Pall-Mall; / N was a Nose that turned chirp on his pal; […]1846, George William MacArthur Reynolds, The Mysteries of London, page 60: