Next time you're signing with your friends, drop the ASL textbook formality and start flashing the signs they don't teach in any classroom, including:
- cool slang
- funny insults
- explicit sex terms
- raw swear words

Dirty Sign Language teaches casual everyday words and expressions like:
- Peace out
- Asshole.
- Bit me
- Dumbfuck
- Boner
- I'm hung like a horse.