A name given to a person whose swag-levels are off the charts. He is also referred to as "Based God" and "Brett Stansel". He most likely fucked your bitch, parked your car, and did other activities to prove that he's better than you. His catchphrase is usually something like, "I am the end of the world", or something centered around misanthropy and nihilism. Kwaku employs misogynistic and sexually deviant imagery in his speech to make the person/people he's talking to feel bad about themselves, and about all of humanity.
Jason: Dude, I wish I was Kwaku Mensah.
Christian: Me too. He fucked my bitch. :(
Jason: DUDE, he parked my car!