>>60728748no. The term “squeeb” originates from one of the noises piglins in Minecraft make. Piglins were added in Minecraft 1.16, released June 2020. Bugsnax released in November 2020. Therefore the minecraft noise predates any public knowledge of its use in bugsnax. Although yes the term is used in bugsnax, albeit as a noun rather than an onomatopoeia
