The song "You Think You Know" by JPEGMAFIA expresses the artist's frustration with people who claim to know him or understand his experiences without truly knowing him. The lyrics contain aggressive language and confrontational statements aimed at various groups of people. In the song, JPEGMAFIA challenges people from different places and backgrounds, such as "county niggas," "Fredrick niggas," "Hamden niggas," "Towson niggas," and "artsy niggas," claiming that they don't really know him. He asserts that these people, including "trust fund kids" and "MICA students," cannot comprehend his true identity or his experiences. He dismisses their assumptions and emphasizes that he knows himself better than anyone else. JPEGMAFIA also addresses racial and ethnic identities, such as calling out "lightskin niggas" and "half-breeds," suggesting that they also do not understand him. He criticizes "white boys" and "fake thugs" for their lack of understanding and challenges their fear of guns. The song's aggressive tone and use of explicit language serve to amplify JPEGMAFIA's frustration and defiance. It showcases his individuality and asserts his autonomy, challenging the assumptions and stereotypes placed upon him. Overall, the song is a defiant statement against those who claim to know him without truly understanding his experiences and identity.