A woman has shared the abusive notes she is left by her downstairs neighbour who has complained about the noise coming from her flat.
The video has racked up more than 630,000 views as people hit out at the unnecessarily cruel messages - and suggested ways to take revenge.
TikTok user SavanahPierce4 said her neighbour had previously accused her about being too loud and she replied to apologise and say she was trying to be as quiet as she could.
In return she received a note addressed 'To the 'heavy' AKA fat person' containing a double sided letter attempting to shame her.
It read: "What really worries me is that one of these days I'm going to see 4 fat (really fat) legs & a**es come through the ceiling.
"Have you looked in the mirror? Oh wait, don't do it side by side - only one would fit. You should both be ashamed of yourselves!"
"Oops - I put another note on your door! Complain to management!
"Is your fat friend on the lease?"
It also included the contact details of three companies specialising in weight loss and healthy living.
The video was shared with the caption: "My neighbour Claire really hates fat people I guess."
It left some people furious, as one said: "Please name her and her workplace. This behaviour warrants hitting her in the place that will hurt her."
Another said: "TikTok needs to stop making me lose my faith in humanity."
But others turned straight to revenge, as one person suggested: "What's that? You want to learn Irish step dance at 2am? YouTube has some instructions."
Another replied: "I think tap shoes are such a great accessory. Maybe you should wearing them at home! All the time!"
A third wrote: "Don't be shy, put in a 3am HIIT workout."
