Nutt-Butt= gettin it up the butt
therefore someone who is a nutt-butt acts dumb/corny as hell as if they've been gettin it up the butt...
"He's switchin a lil too hard, you know he's a nutt-butt"
"This old ass nutt-butt shouldn't be out here drivin"
"Yall nutt-butts is too hype and it is too early in the morning for dat"