Top Definition
1. A portmanteau of improbable and impossible.

2. When something is so improbable that it might as well be impossible.
Person 1: I could jump across that river.

Person 2: No you couldn't. You would fall in and drown.

Person 1: Nah, I could make it.

Person 2: There is like a .00000001% chance that you could make that jump. That's pretty freakin' impobable dude.

Person 1: But not impossible *tries to jump across river, but promptly falls in*
by brainytheinsaney May 17, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.