Andrew Bernstein (born February 7, 1974), better known by his stage name Abdominal, is a Canadian rapper from Toronto, Ontario.

Andy Bernstein grew up in Toronto and attended Northern Secondary School in the late 80s and early 90s, gaining a reputation there for his cartoons and graphic design work.

Using the name Abdominal, he formed his first rap crew with DJ Serious and Scott C. called Rushholme and they started recording tracks.

Abdominal's raps became a standout feature on DJ Format's first album, Music For the Mature B-Boy, released in 2003.

Abdominal also appeared on DJ Format's second album, If You Can't Join 'Em… Beat 'Em, in 2005, alongside fellow Canadian rapper, D-Sisive.