“Come Together is me, writing obscurely around an old Chuck Berry thing. I left the line in ‘Here come old flat-top.’ It is nothing like the Chuck Berry song, but they took me to court because I admitted the influence once years ago. I could have changed it to ‘Here comes old iron face,’ but the song remains independent of Chuck Berry or anybody else on earth.” - John Lennon
The line “Here come old flat-top” is from Chuck Berry’s song “You Can’t Catch Me.” As a result of this, Lennon was sued by Chuck Berry’s publisher, Morris Levy. The case was settled out of court.