1 definition by jsmith0708

To indicate a sad time, or some kind of disappointment.
"Hey man, you going out to the bars with us tonight?"

"Nah, girlfriend is dragging me to a chick flick. It's so flat soda."

or

"Working late again?"

"Yeah, it's like flat soda."
by jsmith0708 April 7, 2008
Get the Flat Soda mug.