1) joel: hey will you give me road head?  rae: only if you give me road munchies
1) the act of orally pleasing a girl while she is driving  2) smoking weed while driving resulting in an instantaneous trip to mcdonalds
"1) joel: hey will you give me road head?  rae: only if you give me road munchies" What is the definition of "road munchies"?