When you tell a friend something hilarious and they instantly turn around and use it as their own joke right in front of you, especially in front of women, popular people, and just for the simple fact of showing off for others.
We were eating a Hot N Ready Pizza from Little Caesar's when I noticed that the proof of purchase said, "Proof of six inch purchase".
I instantly ripped it off the box and showed it to my friends; we all got a good laugh out of it. One of my friends asked to see it, so I handed to him and he darted off with it.
Next thing I knew he was showing it to all the girls in the room.
Friend: "Wow, he always does that."
Me: "Yeah, he joe tagged it as usual."