The 'Pretty Cool Guy' meme, typically featuring Halo’s protagonist Master Chief, originated on 4chan's /v/ board in early 2007. It is defined by the iconic catchphrase: 'I think Halo is a pretty cool guy. Eh kills aleins and doesnt afraid of anything.' The joke stems from the intentional misspelling of 'aliens,' the grammatical error in 'doesnt afraid,' and the common mistake of calling the character 'Halo' instead of Master Chief. The phrase exploded in popularity through the machinima series 'Arby 'n' the Chief,' which satirized the toxic and illiterate culture of early Xbox Live. Today, the meme serves as a nostalgic callback to the Golden Age of the internet and is used to ironically praise characters with intentionally broken English.