<human>: So last night me and my friends were driving and I decided to tell them this story and they wanted me to post it on this subreddit. So me and my older brother were having a conversation about standing up for others and the what to say when you get into a confrontation. So being the sneaky older brother he was, he told me to say "hey stop Jerking off!". As a young child I thought it meant that you are telling the person to stop being a jerk but we all know it has another meaning to it. So fast forward to a couple months later at a swimming pool. There was this red head freckled kid who was making fun of my friends. Remembering my conversation with my brother, I decided to stand up to this guy. I pushed him against the wall and said " why you are Jerking off!!" Being in a public change room, everyone was very confused on why I said that and the redhead kid was even more confused. When I got home my friends that I stood up for told me the real definition of the term "Jerking off"............. I was so embarrassed

Can you summarize the given text in a few sentences?
<bot>: brother told me that " Jerking off"meant being a jerk. Pushed a kid and told him "stop Jerking off" and the kid was confused and I was embarrassed after learning the real meaning