What does "Thunderdome" mean?
Native speaker’s answer
Rebecca
"Thunderdome" is the name of a gladiatorial area in which contestants fight to the death in the 1985 action movie "Mad Max Beyond Thunderdome." The movie gained a lot of popular culture influence and "Thunderdome" is now used casually to refer to any situation or contest in which the loser suffers a great hardship. This is what WikiBear is referencing when he taunts Conan and the audience by saying "I'll make you all fight to the death in the Thunderdome!"