noun- A term used to covertly identify an alcoholic drink of your choosing that you can enjoy in the car; an essential part of the driving experience.
Me, my dad, and my six year old brother hopped into the big ole pick-em up truck.
Joe Bob- Dammit cleetus, blow into the interlock while yer brother gets me my roady sodie
Cleetus- you got it pa, bottles or cans?