happy sappy
Nauseatingly upbeat. Not only do you see the silver lining in every cloud, but you're always turning lemons into lemonade and sow's ears into silk purses. You're just so amazingly chipper that you inspire everyone around you to wonder if killing you might be considered justifiable homicide.
Even though we were down by thirty points, the cheerleaders were still so happy sappy that I wanted to slap them.