什么时候大姨夫也红遍全国
[shén me shí hòu dà yí fū yĕ hóng biàn quán guó]
This nickname humorously asks when ‘the aunt’s husband (which means brother-in-law)’ would become nationally famous. It's a lighthearted, informal way to poke fun at someone or a situation that seems implausible.