ah(,) shucks

1. An expression of shyness, happiness, or embarrassment. A: "You're just too sweet!" B: "Ah shucks, you're gonna make me blush." Though he was clearly thrilled by her compliments, all he could manage was a timid, "Ah, shucks" and a smile. Ah, shucks, it was nothing, really. Anyone else would have done the same thing.

2. An expression of disappointment. Ah shucks, it looks like we're going to lose the game after all. A: "Sorry, kids, the rain clouds are rolling in—we're going to have to cancel the picnic." B: "Ah, shucks!" Ah, shucks—that was supposed to be a surprise for your birthday!