Wiktionary
n. A con man who tries to deceive members of the public.
Usage examples of "magsman".
He decelerated, put Sigurd Magsman down, and switched on the retinal light in his eyes, trying to pierce the wombgloom.
Sigurd Magsman was broadcasting terror and anguish with such a telepathic bray that Foyle was forced to shake the child again.
Foyle hurled Sigurd Magsman up into the air like an ancient Scotsman tossing the caber.
Ikey, who at the age of twenty-one was already coming on as a notorious magsman and was thought not without spare silver jiggling in his pockets, came along, his very repulsiveness made him attractive to her.
He was intimate with cracksmen and fences, magsmen, goniffs, and shofulmen, the swell mob, the fancy sportsmen and sporting houses, the citadels of the underworld.
There were plenty of magsmen about, sharp con men who often employed an unwitting accomplice, setting him up to take a fall in some elaborate scheme.