A less explicit version of "You couldn't catch herpes in a whorehouse!" It means that no matter how hard they try, no one will be able to catch anything.
While a pack of dogs chased a cat, the catinsulted 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.
"She only wants to chill when we smoke!"
"What an apoxy fuck"