word-forming element in colloquial compounds (hen-fest, gabfest, etc.), from 1889, American English, borrowed from German Fest "festival," abstracted from Volksfest, etc., from Middle High German vëst, from Latin festum "festival or holiday," neuter of festus "of a feast" (see feast (n.)).
beano n.
1888, colloquial shortening of beanfest "annual dinner given by employers for their workers" (1805); they had a reputation for rowdiness. From bean (n.) + fest (n.).