Clancy is a recurring antagonist in the Heckle and Jeckle cartoons. He is a short-tempered bulldog who tries to put an end to the magpie's antics but always fail to do so. He works various jobs, notably as a security guard. In some episodes, he is paired with Dimwit who also gets on Heckle and Jeckle's nerves. However, Clancy is very mean to the dumb dog.