1) When a door is unable to be opened due to mechanical failure (broken door knob), you have to re(k)nob the door.
2) A physical anomoly that happens when a male reproductive organ deflates or becomes flacid, very rapidly. Usually from fright, fear, unwanted touching from another male, or very strong, unpleasant vaginal odor. The opposite action of a p'fong.
2) "I just saw your gramma's tain't when she bent over to pick up her purse. I have renob now"
re(k)nob-(the k is silent) and/or renob