What is ""Του κόρναρα."" in American English and how to say it?

Greek

Του κόρναρα.

Του κόρναρα.-I honked at him..svg
American English

I honked at him.

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Example sentences

American EnglishI was stuck behind a slow driver, it was so annoying!

How ""Του κόρναρα."" is said across the globe.