Naked Dingus
A guy, usually a man, takes off his pants, squats down, and punches his butt with a closed fist like it’s a punching bag. People do this to tease each other or for a laugh when asked.
My cousin did the Naked Dingus in front of my whole class. I laughed so hard I cried.
At the bus stop, my friend told me to do the Naked Dingus. I did it and got a standing ovation.
My teacher made me do the Naked Dingus in front of the whole school. I was so embarrassed I wanted to die.