Next time you're traveling or just chattin' in Czech with your friends, drop the textbook formality and bust out with expressions they never teach you in school, including:

- Cool slang

- Funny insults

- Explicit sex terms

- Raw swear words

Dirty Czech teaches the casual expressions heard every day on the streets of the Czech Republic:

What's up? -- Co je?

I adore your small titties -- Zboznuju tvoje kuzlatka.

I gotta take a leak. -- Musim se...