My kid is a spitter.
It all started when he began noticing that we spit after we brush our teeth. He decided that he needed to spit also. He'd stand in front of the sink and imitate exactly what we do. Trouble is, he stands only as tall as the cabinet underneath the sink. My cabinets started getting spit baths. And this led to my toddler misunderstanding social skills in a mighty way.
He started spitting everywhere. He spits his chewed up food out. This is especially fun when he decides he's finished with his Kudos bar and, while on an airplane, spits mangled chocolate down the front of him instead of swallowing. He spits bath water. He empties a bucket full of dog toys and spits milk into it at my parents house.
It's a problem. We're working on it.