Get off your tush and let's get down to it

The story:

I was at that oh-so-awkward age of 11 and among a group of twenty-somethings. One of them had an adorable little three-year-old daughter. Rachel was performing various songs for the group, entertaining them with her charm. When she started singing this song, I guess my jealously overcame me and I felt the need to correct this little naive child. "Rachel, Rachel," I said, right in the middle of her performance. "It's not 'put up your dukes, it's 'get off your tush and let's get down to it'. All eyes were on me, and let's just say they weren't looking at me with the adoration I so craved. After their disgust wore off, they erupted in laughter that I can still hear to this day--24 years later.