to think saying, so much shit comes out of your mouth, your arse must be jealous, is a bit too rude

[FestiveFox]

for joke

Well you're not unreasonable to feel what you feel.
I'm one of those very fortunate people who does not get offended at all, but maybe that's not always a good thing.

Incredibly rude. The only way anyone could get away with saying such a vile thing is if it was truly tongue in cheek and there was a lot of love between the two people. Even then it seems one step too far

Depends who you say it too

It's the sort of "joke" that usually goes down badly, I'd have said. You have to be very confident about the reception that sort of comment is likely to receive and even then, most people wouldn't appreciate this particular remark.

I'm going to imagine I've said that to a couple of people I've crossed swords with in the past.

You know, when you replay it in your head and you find the perfect retort you wish you had made...

It's really not funny either, my friends have pretty dark humour, but this just isn't funny.

Yes it's very rude.

Is sat here giggling

I do have a bit of an odd relationship with my mum but we say stuff like this to each other all the time and it's always a joke.

I sounds like the kind of thing said by someone who loves 'your momma' jokes. 'Yo mamma is so fat I took a picture of her last Christmas and it's still printing'.

I loved it and must remember that line. Where I work it will fit in perfectly for some of the people that cant be arsed to do their jobs properly and always make excuses. Definitely have to use this one, sparingly tho.

My boss phoned in sick one day - diarrhea was her ailment - one of my colleagues piped up 'Is it coming out of her arse or her mouth as usual?' Still makes me laugh

OP - Yes a rude thing to say .......but was it deserved?

Ours is "He/She is so full of shit it comes out both ends". Yes, it's rude. But it also is very true at times, too.