Point of No Return. You've gotten this far, might as well keep going. - rhymes with boner.
I achieved the PONR when I accidently made eye contact with the husky girl, so I felt no shame in taking her upstairs for some disgusting, but fun sexual acts.
While driving, say "PONR" when approaching an intersection when the light is green but you know its about to change...at this point, you are officially allowed to run the red light no matter how blatant it is. - Works really well when pulling a trailer with lawn mowers on it in montgomery county, md.