矫揉造作卖萌撒娇你的本性
[jiăo róu zào zuò mài méng sā jiāo nĭ de bĕn xìng]
This phrase translates to 'Showing Affection Exaggeratedly is Your True Self'. The username humorously describes someone who frequently acts cutely or affectionately as a genuine characteristic, perhaps implying it is their natural personality to behave in such an attention-seeking manner.