jingo

UK: /ˈdʒɪŋɡəʊ/ US: ( jing′gō)

Inflections of 'jingo' (n): npl: jingoes

WordReference Random House Unabridged Dictionary of American English © 2025

jin•go  ( jing′gō), n., pl. -goes, adj. 
n. 

1. World History a person who professes his or her patriotism loudly and excessively, favoring vigilant preparedness for war and an aggressive foreign policy;
   bellicose chauvinist.
2. World History [Eng. Hist.] a Conservative supporter of Disraeli's policy in the Near East during the period 1877–78.
3. Idioms 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!

adj. 

4. World History of jingoes.
5. World History characterized by jingoism.

• 1660–70; origin, originally conjurer's call hey jingo appear! come forth! (opposed to hey presto hasten away!), taken into general use in the phrase by Jingo, euphemism for by God; chauvinistic sense from by Jingo in political song supporting use of British forces against Russia in 1878

Collins Concise English Dictionary © HarperCollins Publishers::

jingo / ˈdʒɪŋɡəʊ/ noun ( -goes)

1. a loud and bellicose patriot; chauvinist
2. jingoism
3. by jingo ⇒ an exclamation of surprise

Etymology: 17th Century: originally perhaps a euphemism for Jesus; applied to bellicose patriots after the use of by Jingo! in the refrain of a 19th-century music-hall song