The funnyman passed away on Saturday (13Aug11) at a hospital in Glendale, California. He was 62.
Dunlop began his career in entertainment in the 1960s and landed a regular spot on Richard Pryor's TV variety show in 1977.
He went on to guest star on hit '80s show Harper Valley P.T.A., and also made appearances in films like The Devil and Max Devlin, Skatetown U.S.A. and Martians Go Home.
However, he was perhaps best known for cracking jokes on American game show Make Me Laugh.