(Chiefly British English)
1. Crazy, Utterly ridiculous, philosophically disjointed
-or depending on vocal inflection:
2. Delightfully silly
"(To start a new religion) you have to be a person of the type who gets (satisfaction) making people believe something they would have regarded as perfectly potty before meeting you."

Here's a literary example:
"Speaking of ‘lectricity…have this clock and it’s run slow for two years and all of a sudden, whacko, it runs on time. Now I wouldn’t a thought a thing, but Rigby said same thing happened to him. It’s as if they upped the voltage or something.

Darling, you’re perfectly potty."

-excerpt from "Hand Do Lie" by Laureen Vonnegut
by Bitter Blackale September 30, 2013
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