A'ight Blah
When someone is so fed up with the nonsense coming out of another person's mouth they just say 'a'ight... blah' like it's the last straw.
'I can't believe you're still talking about that stupid meme.' 'A'ight... blah.'
'He just told me his dog's name is Sir Biscuit.' 'A'ight... blah.'
'She's explaining why the sky is blue for the 10th time.' 'A'ight... blah.'