Yep. That's baby spit-up or "urp" as we sometimes call it. It's nasty, smelly, gooey stuff that makes it's way out of my baby's belly and squirts out of his mouth numerous times a day -- and usually, as in this case, ends up all over me. Isn't it lovely? He's ruining all of my clothes. Good thing most of them were bought on clearance at Old Navy. I refuse to spend a lot of money on my clothes until I no longer have anyone in diapers at my house. It's just not worth it!