"Penguino" is the official term for fans and viewers of Commandernate. Nate himself is a real life penguin that runs a channel dedicated to video such as Minecraft and Garfield Kart. Nate often describes himself as a "big boy" and shows this off by wearing his "big boy pants".
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”
Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murdererused a serrated blade.