imperative mood of the verb To GO. N.
·v Began; commenced. II. Gan ·Impf & ·p.p. of <<Gin>>. ...
Webster's Dictionary of the English Language
The mouth or lips. Cant. ...
Dictionary of The Vulgar Tongue by Francis Grose
See gang-gang ...
Dictionary of Australasian Words Phrases and Usages by Edward E. Morris