meaning for 鼻涕 bítì:

  • - nasal mucus
  • - snivel

zài
hái
tuōzhe拖着
bítì鼻涕
de
niánjì年纪
jiùshì就是
de
bǎohùshén保护神
zhìduōxīng智多星

Before you drag the nose of older, he is your God and Master-mind.