a person who professes his or her patriotism loudly and excessively, favoring vigilant preparedness for war and an aggressive foreign policy; bellicose chauvinist.
a Conservative supporter of Disraeli's policy in the Near East during the period 1877–78.
(an exclamation used to emphasize the truth or importance of a foregoing statement, or to express astonishment, approval, etc.): I know you can do it, by jingo!