不和雪碧是因为我怕透心凉
[bù hé xuĕ bì shì yīn wéi wŏ pà tòu xīn liáng]
This nickname humorously means 'Not drinking Sprite because I'm afraid of feeling icy cold inside'. Sprite is a well-known carbonated drink which can feel very cold when consumed, leading to the playful exaggeration in the nickname.