For the inquiring minds who want to know:
The word 'cheesy' is defined as (informal) of very poor quality. Synonyms: crummy cheap bum chintzy punk sleazy tinny. Related terms: Similar to inferior
Etymology: cheesy - "cheap, inferior," 1896, from Urdu chiz "a thing," picked up by British in India by 1818 and used in the sense of "a big thing." By 1858, cheesy had evolved a slang meaning of "showy," which led to the modern, ironic sense.
The word 'fest' is defined as:
Meeting or occasion marked by (such) activity <songfest>
So cheese fest, by definition is an occasion of poor quality or sleazy meeting.
Sorry Doris but the word cheese fest, the negative connotation as it is currently used, has nothing to do with the Green Bay Packers football team. (Although some might think the 29 year drought was indicative of a 'cheese fest' when the Pack met an opposing team.)
4dk – who has been a Packer Backer since 1948