It began as a candid note between two mates who had been out for some drinks and a curry the night before.
But now thousands are reading the crude message by City law firm employee Matthew Thompson after he accidentally sent it to all his colleagues at solicitors Addleshaw Goddard
Thinking he was addressing a friend, he wrote: 'How're the guts today? I haven't farted all day but I feel a monster dump coming.'
The e-mail spread like wildfire to all 1,500 colleagues of the firm in London, Leeds and Manchester as Mr Thompson desperately tried, in vain, to recall it.
Within minutes the message had been forwarded beyond the company, with a photo of admin worker Mr Thompson helpfully attached.
Soon it was being read across the City and beyond.
One recipient wrote: 'This is the funniest thing I have seen in ages. How embarrassing!'
Another commented: 'Having a bad day? It could be worse...' Calls to Mr Thompson were being diverted to his voicemail when Metro called.
A spokesman for the firm said: 'We are aware of the e-mail.'
Metro.co.uk