I'm John - You act like someone else and say 'I'm John' to make fun of

You act like someone else and say 'I'm John' to make fun of them, like they're the most brainless person you've ever met.

He said, 'I'm John' in a fake voice, like he was the most annoying person ever.

She copied me and said, 'I'm John' like I was the dumbest person on the planet.

He did a terrible voice and said, 'I'm John' like he was the worst person ever.