A less explicit version of "You couldn't catch herpes in a whorehouse!" It means that no matter how hard they try, no onewill be able to catch anything.
While a pack of dogs chased a cat, the cat insulted them by saying, "You couldn't catch chicken pox in a henhouse!"
Someone who lacks all forms of good vibes. Similar to calling someone a "fuck" but worse. Someone who has naturally fuckish vibes and habits. Does and says things that are perpetually annoying and upsetting to everyone in the immediate area.