Nat

Andre thought Nat would always be on the down low and never come out.

Nathan was one of the tiniest, tottering along, holding on to the hand of a much older girl. Nat. Small like a gnat.

They greatly dread evil "Nats" or spirits, to whom they attribute every possible misfortune or illness.

And he a pistle rowned in her eare, / Nat what I want, for I ne came nat there.

After rolling a Strength check to move a heavy cabinet, I got a nat 1 and the cabinet fell on me.

in the Dark Sun campaign I'm playing in, the DM handles crits/fumbles this way: Natural 20: an excellent attack, player gets a bonus attack, if he gets another Nat. 20, he gets a 3rd attack, and so on.

Almost killed my cleric mage when she was juggling with another bard...missed the juggling check, rolled a nat 20 on the to-hit roll, and rolled maximum damage...and said cleric-mage was already wounded, and recuperating...8P

But she continued. "I do a Survival check to see if there are any worm people in these puddles... and roll a nat twenty!"