The Power of Duh

Like fossils that keep on surfacing out of the rich Siberian mud, "Duh" has made a comeback in my life. It is as ripe an expression for Kate as it was for me when I was a teenager. From about 13 to 16 years of age, I used
'Duh" all the time to express annoyance or incredulity that the person in front of me could be so incredibly stupid and/or clueless. And now that my daughter is a teenager she too uses it to express all those same emotions. "Have you brushed your teeth,?" Duh. That could mean yes, of course or I'm gob smacked because I hadn't really thought about running some twigs across my teeth. Another variant of this is "Oh, Mom, duh." That is often used as a response to such diverse questions as Did you do your homework, write your grandmother and clean up your room. Or even, I'm going to go walk the dog, how's the weather?

Duh

What else is so all purpose and satisfying?