I have nothing as funny as you guys, but in my last meet, I invited my best friend. My vault was a yurchenko, and she thought it looked cool. After the medal ceremony, she asked me if I could show her that cool move again. I didn't know what she was talking about, and she tried to elaborate.
Friend:"Can you do that again?"
Me:"Do what?"
Friend:"You know, that cartwheely - turny, jumpy thing, then you're like in a backward handstand and you go down?"
Me:"No. I don't know."
Friend: "It's on that thingamagig - it's high and odd looking."
Me:"What, the beam?"
Friend: "No, you didn't suck at this one."
Me: "Hey! Anyway, WHAT are you talking about?"
Friend: "The lumpy thing...it looks like a rock... oh yeah, the pommel horse!"