"Say Man" is a song by American musician Bo Diddley. Written under his real name of Ellas McDaniel, it was recorded by Bo Diddley in 1958 and released as a single in 1959 on Checker 931. The recording became his biggest US pop hit, reaching number 20 on the Hot 100, and number three on the R&B chart. It arose from a jam session between Diddley and his maracas player Jerome Green, and featured Diddley and Green trading insults in the style of the word game known as The Dozens. The recording also appeared on the album Go Bo Diddley.