literal meaning: not tired when something is annoying
translated: to not mind the trouble
不厌
bùyàn
heavily made up
不
bù
no, not
厌
yàn
to tire, get sick of
其
qí
it, that
烦
fán
trouble, bother
Ayo97, 阿涵 - 感谢你曾来过
Ayo97, A-Han - Ganxie Ni Ceng Lai Guo
谁会不厌其烦的安慰那无知的少年
Shéi huì bùyàn-qífán de ānwèi nà wúzhī de shàonián
Who will take the trouble to comfort a naïve young person like that?
In this song, the rapper describes a person who he loved when he was young. While he once found her innocence attractive, he now thinks that it would be tiresome to be with someone who was immature.