a two cents plain
A two cents plain is the cheapest drink you can get. It’s like being poor and also being thirsty.
My dad said, ‘You can have a two cents plain or go out and get hit by a car.’
My friend tried to upgrade to a chocolate soda and got called a ‘two cents plain snob.’
At the diner, I got a two cents plain and my friend got a chocolate soda and cried.