*bull moose*

. (U. S. Politics) (a) A follower of Theodore Roosevelt in the presidential campaign of 1912; -- a sense said to have originated from a remark made by Roosevelt on a certain occasion that he felt “like a bull moose.” [ Cant ] (b) The figure of a bull moose used as the party symbol of the Progressive party in the presidential campaign of 1912. -- Bull Mooser. [ Cant ] [ Webster 1913 Suppl. ]