To take someone else's joke and add to it in order to create a running joke. This is done repeatedly by Dara O'Briain on Mock The Week but has been observed on several other panel shows including Have I Got News For You. It also happens on The Last Leg, particularly by Josh Widdicombe.
You are just a joke surfer Dara.
When someone says something rude but plays off as a joke so to be unnoticed by others around
'Why is she here?'*laughs'just kidding it wasn't an abusive joke'
Person 1: what to hear fun joke
Person 2: yes
Person 1: Fag
A joke so mindfuckingly hilarious that it turns you insane or gay, depending on your personality type.
Charlie Sheen: "That Dave Chapelle asylum joke was so funny, that I literally went insane and started rubbing testosterone cream all over my balls!"
The line between being in on the joke and being part of the joke.
Tom was laughing at the joke until he crossed the joke line and realized he was the butt of the joke.
Durham jokes are usually not very funny, sometimes they are stupid enough that you can laugh at the person saying them
"PeePeePooPoo YAIY YAIY YAIY YAI!!" is an example of a Durham Joke