Lines you'd use if only the appropriate situation came up.

One I’ve used in real life:

“What’s shaking, Just1Lurk?”
“All four cheeks and a couple of chins.”

(Actually, I’ve used several Normisms, but this one absolutely killed.)

I’ve always wanted to walk into my own funeral and say
“Mind if I give the eulogy?”

“She’s short and skinny, but she’s strong. Her first baby come out sideways. She didn’t scream or nothing.”

The games afoot. We haven’t a moment to lose!

“A severed head! And it’s a jim-dandy!”