Webster's Revised Unabridged Dictionary · 1913

bam

bam (bam) , noun

[Probably a contr. of bamboozle.]

An imposition; a cheat; a hoax. — Garrick
To relieve the tedium, he kept plying them with all manner of bams. — Prof. Wilson

Bam , transitive verb

To cheat; to wheedle. [Slang] — Foote