The FUCKING BOSWELL THREADS used to be this type of thread for me until I found the answer!
Poster asked for help solving a riddle/joke of her inlaws that she didn't get. She wrote:
'There once was a man called Boswell. For short they called him Bos, and he walked up the post office steps.'
Pages and pages of invested MN trying to help:
https://www.mumsnet.com/talk/am_i_being_unreasonable/3441291-to-ask-for-your-help-solving-this-impossible-riddle-joke?postsby=killingtime9198
So much so there were sequel threads:
https://www.mumsnet.com/talk/am_i_being_unreasonable/3442896-I-NEED-MORE-ABOUT-BOS-WELL-solve-a-riddle-part-two
and then the OP @killingtime9198 (looking at you if you are still here) had the unbelievable cheek to pitch up and tell all these MN posters who'd spent hours analysing and trying to help that they had solved it but couldnt tell us. It tells you something that I could be bothered to go to find that post to included it linked here:
https://www.mumsnet.com/talk/am_i_being_unreasonable/3442896-I-NEED-MORE-ABOUT-BOS-WELL-solve-a-riddle-part-two?reply=83092653&utm_campaign=thread&utm_medium=share&utm_source=copylink
Years later, someone unaware of this controversy on a different thread about riddles I think posted the answer and it turned out that a key part of the original was missing which was What is his name and occupation? and the words weren't right.
The full thing should have been:
There once was a man called Boswell and for short they called him Bos, and he walked up the post office steps in the morning. What is his name and occupation? '
The answer is Andrew Boswell, Postmaster.
Punctuation as in
There is a man call Boswell ('And' for short). They call him Bos, and he walked up the post office steps in the morning.
The name comes from the And for short. The job is because all the postmen will be going out in the morning to deliver and the postmaster goes into the post office.