Ja zwanzig (yes 20)
The best way to say yes when you're being asked for something and you're not in the mood to be polite
'Ja zwanzig' when the waiter asked if I wanted another beer and I was already drunk.
'Ja zwanzig' when my friend asked if I wanted to go to the mall and I just wanted to go home.
'Ja zwanzig' when my mom asked if I wanted to clean my room and I was too lazy to say no.