I just thought that phrase was clever (I came up with it myself).
It's the phrase I use when Simone farts while I'm changing her - it almost always precedes some poo. So, if I'm quick, I can cover her up and contain the mess. Unfortunately, not all poo follows that clear signal, sometimes she's in stealth mode.
People were right - when you have a baby, you just talk about bodily functions.
It's kind of like I'm hanging out with Sam and Ron.