<human>: Summarize the given text in a few sentences.

When I was in middle school, and my brother was in like fourth grade, a thing went around in my school. It was when someone said something derpy, a person would hit them in the back of the neck and say beefneck. It got banned pretty quickly, so I invented this thing called an applejack. being a loser, the only person i told it to was my brother. 
     A few months later, my brother had a friend over, and the first thing that kid did to my brother was an applejack. (Grabbing someones shoulder and jumping up). I said, 
     "Is that an applejack?" 
     "yea!" The kid said.
     'I invented that, you know!" I replied.
     "no way!" The kid said, dumbfounded.
     Then my brother came in, and we convinced him. However, everyone in that school claimed credit for it, even some fifth graders. I was filled with a sense of pride.
     <b>
<bot>: </b> I invented something stupid for elementary school kids where i didn't get the credit and it died in six months.