1. noun: a mess comprised of fragments of matter, especially when those fragments are grody.
Example: the bits of toothpaste all over the bathroom mirror, flung from one's mouth.
2. intr. verb: to make a mess comprised of fragments of matter, especially when those fragments are grody.
Example: to vomit on something or in an area not suitable to vomiting.
Etymology: Derived from the archaic "spleatch child," a rare form of human that when struck by a moving vehicle, explodes instantly into a giant, grody mess.
Dude, after drinking all the rum, Kevin totally spleatched all over the kitchen.
Watch it man! When you just sneezed, you got spleatch all over my new iBook's screen.