a person who professes his or her patriotism loudly and excessively, favoring vigilant preparedness for war and an aggressive foreign policy; bellicose chauvinist.

English History . a Conservative supporter of Disraeli's policy in the Near East during the period 1877?78.

of jingoes.

characterized by jingoism. ?

by jingo! Informal . (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!