J-bub
The worst kind of backup plan, when you're too lazy to think of your own insult, so you just copy someone else's and hope they don't notice.
He didn't even think, he just copied my insult like a total copycat.
She said I was a chump, so I said she was a chump, and now we're both chumps.
He had no idea what to say, so he just repeated what I said, and it looked like he was brain-dead.