Austins words for potty

So now that we are having great success with Austin and the potty and he is telling us that he has to go, we need to teach him what to say. When he has to pee he yells out my peeper and for a BM he says my bumbum. Which is all ok, except we were at the grocery store yesterday and all the sudden he yells out (screams) my peeper! The people that were around just stopped and looked. I am not sure why he refers to potty this way, we always ask him if he has to go potty. His other fetish is he needs to take his pants down were ever he has to go potty and then walk to the potty, which is pretty funny watching him walk from the livingroom to the bathroom with his pants around his ankles.