Is ML confusing him for someone? From where did that 'disgusting whore' pop up ?

What, why? Is the Uke a slut?

Nope he seems fine to me . ML came out of nowhere And blasted shit Outta him while saying disgusting whore.
Its strange but I'll keep mum about it since there aren't many chapters.
Yeah but this setting is 'wtf where did that come from' actually.

So, it's most probably an ashole move from ML

I think no , ML doesn't look violent type to me . There must be something for him to react like this. He's also got some sort of attack? O_o