So it's late, and I was milling about the interwebs and stumble upon this yahoo travel article. It's a bogus state-by-state list of funny colloquialisms. Nothing special. However, I get to Iowa and lo and behold:
What the rest of us call a “wedgie” seems to have a softer-sounding version in Iowa, where they call it a “snuggie.” Yup, like the diapers."
I went down to the comments to see if anyone called it and found a few people asking what the heck a snuggie diaper was.