What is "bo diddley beat"

n. a rumba-like beat made popular by musician Bo Diddley similar to hambone, somewhat resembling the shave and a haircut beat.

The Bo Diddley Beat is a kind of syncopated five- accent clave rhythm. The Bo Diddley beat is named after Bo Diddley, who introduced and popularised the beat with his self-titled debut single. Although Bo Diddley was a rhythm and blues musician essentially, the beat is widely used in rock and roll and pop music.