姑凉我不矫情少年我不做作
[gū liáng wŏ bù jiăo qíng shăo nián wŏ bù zuò zuò]
The meaning is 'I don't act coquettish (as a girl) / I don't act falsely (as a boy).' The user wants to convey honesty and authenticity in their character, indicating they do not put on airs or try to impress others falsely.