Green’s Dictionary of Slang

abram n.

[abbr. abram-man n.]

1. [17C–mid-19C] (UK Und.) a wandering beggar, adopting tattered clothing and posing as a madman.

2. [mid-17C] a gullible fool, a cuckold.

3. [mid-17C] a counterfeiter.

In compounds

abram suit (n.) (also abraham suit) [SE suit, a petition]

[19C] working as a writer of begging letters, the pursuit of many small-time 19C confidence tricksters.

abram work (n.) (also abraham work)

[late 19C] any form of spurious occupation, esp. some form of confidence trick.

In phrases

sham abram

see separate entries.