Potato Nose
A nose that looks all big and swollen. A really fat nose with a lot of large bumps and for the most part is round.
Ewwwww gross, look at that kids huge potato nose over there. No don't stare at it just like look at it really fast and look away.
mr potato nose
When a dude takes a shit as big as a potato and proceeds to put it on his nose, thereby being a Mr. Potato Nose.
"Dude you should have seen what Jackson did! He shit himself and put it on his face! He's gonna look like such a mr potato nose!"