Okay.... so my ex was over at my house tonight to see our kids (he often does this).
Eldest DC was brushing their teeth whilst the same time trying to ask my ex a question.
Because you couldn't make out the words DC was saying with the toothbrush in their mouth, ex then proceeds to imitate the 'sound' saying something like "wah sah wah ha insert random sound here Are you Chinese or something?"
I've just had my arse handed to me by my ex for pointing out it was casually racist and could he not say things like that.
He has kicked up a massive stink which involved shouting, swearing, in which I asked him to leave. Still, the kids overheard him as he was being deliberately loud in shouting at me.
I'm sat here confused as hell.