Green’s Dictionary of Slang

ring in v.1

[ext. ring v. (1b)]

1. [early 19C+] to substitute fraudulently, e.g. one racehorse for another.

2. [mid-19C+] (US) to gain admission, to force one’s way in, to impose.

3. [late 19C–1920s] to tell lies, to deceive.

4. [20C+] (Aus./US, also ring on) to involve someone in something fraudulent; to subject someone to fraudulent acts.

5. [1900s] to involve.