屁孩懂个毛毛孩懂个屁
[pì hái dŏng gè máo máo hái dŏng gè pì]
Translates roughly to 'Kids know nothing' and reflects an attitude that is both humorous and slightly annoyed, often directed at young people's ignorance or immaturity. The name gives off an air of someone tired of dealing with childish nonsense.