A fictional place in the back of our minds that houses every little stupid mistake our unique self has to offer. This could range from simply mispelling a word, to crashing your car into a brick wall. Specifically, this word refers to mistakes that are in your future.
1. Person 1:
"Did that hurt?"
Person 2:
"Not really. I'm sure I've got worse things in the idiot-envelope!"
2. "Now he's just pulling wildcards from his idiot-envelope."
A day that is entirely taken up with necessary but mind-numbing administration, usually to clear the decks so you can get on with the stuff you're supposed to be doing.
"If I don't get this tax return done today, my head won't be clear enough to finish Ulysses. Time for a Brown Envelope Day." --James Joyce, Trieste, 1921.
The act of ejaculating inside ones boxers while worn then forgetting and having your load dry to your thigh. Usually the result of a parental invasion without knocking or late night jerk session.