A Bergen Joke is one that takes copious amounts of effort to plan while producing low to moderate levels of humor. Typically, a Bergen Joke is enjoyed most by the joke-teller and after successfully completing a Bergen Joke, one should be moderately pleased with oneself when the subjects express their confusion regarding the amount of effort exerted. Historically, Bergen Jokes find their roots in dad-jokes, but in an extended manner and with added shenanigans.
I knew it was a Bergen Joke when my girlfriend couldn't believe I spent 5 months teaching the cat to turn off the lights when our house-guests are in the shower.
He's the best at Bergen Jokes, he never knows when its time to give up.