An entertainment given to journeymen, or provided by the journeymen themselves. It is mainly a printers' affair, which literary men and commercial staffs may attend by invitation or sufferance. The word wayz means a “bûndle of straw,” and wayzgoose a “stubble goose,” properly the crowning dish of the entertainment. The Dutch wassen means “to wax fat.” The Latin anser sigatum. (See Beanfeast, Harvest Goose.)
“In the midlands and north of England, every newspaper has its wayzgoose.” —The Pall Mall Gazette, June 26th, 1894.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894