“Cowabunga!”
It’s older than you think.
From the *Howdy Doody Show *of the '50s.
I use “D’oh!” all the time.
There’s also the David Tennant Dr. Who “What?!”
D’oh actually made it into the dictionary. The original script read “annoyed grunt.” The actual “D’oh” sound was purely Dan Castellanta’s inspiration.
“Saints presarve us!” -Chief O’Hara, 1960s Batman
Dammit, Jim…
We have a winner!
Holy victory, Batman!
I can’t believe nobody’s mentioned “De plane! De plane!!”
Or “Sock it to me!”
Heavens to Murgatroyd!
Bonus points if you can get that without Googling.
I’d like to redeem my bonus points, please. Unfortunately, the point don’t matter. (And yes, I know that’s not actually an exclamation.)
that’s because you’re smarter than the average bear.
“Shut the Front door!”
From Castle.
“Da Bears” . . . . . … sorry 
Soitenly
Bonus for me 
I vote for D’oh! myself.