The floorboards are weakest where they 'butt' (against each other). [=where they meet, where the ends of the boards touch each other]
As a child, she was a clumsy girl who was the 'butt of' everyone's jokes. [=people made jokes about her because she was clumsy]
Why don't you 'get off your butt' and do something? [=why don't you stop being so lazy and do something?]
(..) Let's get going. We got to get you ready. Back on the market. Yeah, I'm a real catch. Single mom with two teenage kids and manure caked under my fingernails. You'll do great. You got the butt of a -year-old boy. That's terrific. I hope our daughter heard that. Ugh. When was the last time you waxed? (..)2009 17 Again