a mixed alcoholic beverage (i.e. rum & coke, soco & lime) contained in a water bottle or nalgene, usually taken to drink on the way to and during class.
Origin: Loyola College, Ninth Floor Campion 2005
Jesse: Yo man, what do you have in that nalgene there?? It smells like alcohol.
Conor: Yea man, thats because its a ROAD SODA!
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