不入耳u
[bù rù ĕr u]
'Turn deaf ears'. In this context, 'u' may represent 'you'. Hence, it can mean 'I do not listen to your words'. By using '不入耳u' as their nickname, this individual is indicating their willingness to ignore certain people or advice. Possibly signifying indifference, stubbornness, nonconformity and self-protection when facing unwelcome voices or criticism from others.