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.
by Myriadicus June 5, 2016

by AmirIsBetterThanMJ February 12, 2020

Use of the phrase "das joke" is appropriate when you want to indicate another person's failure to recognize a joke in conversation.
You: "You're pretty good at this game. It seems like you play often."
Them: "Geez louise, thanks bro! This is actually my first time."
You: "Das joke."
Them: "Geez louise, thanks bro! This is actually my first time."
You: "Das joke."
by bnjmnchrchll August 23, 2010

by Smartslut February 4, 2017

When someone else kills the joke by getting serious, and having to explain why its not funny, and how serious it is instead.
by NirvanasLithium February 12, 2019

by foreverl0st January 15, 2018
