\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]