E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Pigeon-English or Pigeon-talk.
A corruption of business-talk. Thus: business, bidginess, bidgin, pidgin, pigeon. A mixture of English, Portuguese, and Chinese, used in business transactions in The Flowery Empire.
1
The traders care nothing for the Chinese language, and are content to carry on their business transactions in a hideous jargon called pigeon English.The Times.