Waygook in Korean means “foreign lands” or “foreign countries”. Even though waygook seems to be the local English slang word for foreigner, waygookin or waygook saram is how a Korean would say it. Konglish is annoying but Engookaw is just as bad.
Also, in a taxi, when you tell the driver where to go, all you have to say is the location + eeyo. The same goes for ordering food, although joo-say-yo is okay. When you order beer, make sure to use Korean (and not Chinese) numbers + byung, although gae also seems to be okay (maekjoo saybyung); say jang when you get a cup of coffee (ameleekano hanjangeeyo).