Ja zwanzig (yes 20)
A loud and proud way to say yes that sounds like you're yelling at the person asking you
'Ja zwanzig' when the cashier asked if I wanted a bag and I was in a rush.
'Ja zwanzig' when my teacher asked if I wanted to stay after class and I was already mad.
'Ja zwanzig' when my dad asked if I wanted to do the dishes and I was too tired to argue.