Everyone Loves a Mute

I think I may strangle my co-worker soon. It's going to happen. How can someone keep repeating the same joke over and over again without any reaction? If not that, then regaling me tales of "hilarious" YouTube videos.
He's packing a monitor into a box to be shipped out, he came over to me and said "Yeah, I told Ron if he wanted me to pack some fuzzy bunny slippers in there, too." He said it in a bad British accent. I don't know what that means. He's repeating "fuzzy bunny slippers" in the accent every minute or so and I have stopped even pretending to laugh at it, but that does not dissuade him. He just did it again but added "It go hippity-hop."
It must be awesome to work with Teller.

-K.