我的心蹭凉蹭凉的
[wŏ de xīn cèng liáng cèng liáng de]
'My heart is cold, so cold'. It conveys emotional chilliness, emptiness, or possibly disappointment. Just as the physical feel of something cool against your skin feels refreshing, here the coolness of their heart implies a sense of numbness or lack of enthusiasm in one's feelings.