serendiptipsy (adj.) the state of being unexpectedly but not unwelcomely mildly inebriated, often due to insufficient food consumption. Best attained with a nice wine and a good film; never to be undertaken with car keys in your pocket.
A well-behaved day with only a healthy lentil soup for dinner, followed by the really rather excellent A Most Wanted Man and a couple of glasses of shiraz have rendered me serendiptipsy, for sure. There are worse ways to spend your Sunday.