Vore is a sexual fetish pivoting on the idea of being swallowed whole. Due to its uncanny nature it is the center-point of many jokes and is prevalent through a worrying amount of McElroy web content surrounding Griffin McElroy, including CAR BOYS.
For a long period of time Griffin would drop in Vore related jokes into much of the content he is in from MBMBAM to CoolGames Inc to The Adventure Zone (though this is a topic of debate) to a previously believed fictional vore podcast called Big Gulp. The bit has since been mostly retired as of 2017.
In CAR BOYS these jokes are mostly a thin veneer of absurdism instead of full-fledged bits expressly about vore.