jin·go 
(jĭnggō)
(jĭnggō)n. pl. jin·goes
One who vociferously supports one's country, especially one who supports a belligerent foreign policy; a chauvinistic patriot.
adj.
1. Of or relating to a chauvinistic patriot.
2. Characterized by chauvinistic patriotism.
interj.
Used for emphasis or to express surprise: By jingo, I'm leaving here in spite of the blizzard.
[From the phrase by jingo, used in the refrain of a bellicose 19th-century English music-hall song, from alteration of JESUS.]
jingo·ish adj.