shniaper

When your newborn shits in the new diaper you just put on him 30 seconds ago.

Damnit, Sammy just shniapered, gimme a new diaper.

Diaper Geyser

When you're changing your baby boy and he begins peeing straight up in the air while the old diaper is off and you haven't gotten the new diaper on yet.

Honey, give me a burp cloth quick, I got a Diaper Geyser going here!