When a cheap bastard or "badass" kid orders a free water and fills it up with soda in a fast food restaurant. Also a sick song by Attila.
"Bitch at mcdonalds just saw me put soda in the water cup."

"Omg I'm rank 2 badass cuz I put soda in the water cup!!!"

"Dude I just listened to soda in the water cup. Sickest shit ever. Fronz is a beast."
by Sparrow136 July 17, 2014
Get the soda in the water cup mug.