a replacement for 'bullshit.'
once, a girl named laila was walking down the halls of high school when a black man shouted "BULLSHIT!" Laila, being slightly deaf, misheard this blackman and thought he said 'booshji." Ever since, this word has been a thing around the midwest, specifically MKE.
Example: That picture of Rupert Grint smoking a bong is SUCH booshji.
Example: OJ Simpson being found not-guilty? BOOSHJI.