sweetie pie          
noun  informal uk/ˈswiː.ti ˌpaɪ/ us/ˈswiː.t̬i ˌpaɪ/
 [ C usually singular ]小甜心 
a very pleasant or kind person; a person that you like or love
  "Who's this sweetie pie ?" he asked, smiling at the baby. ’这个小甜心是谁啊?‘他笑眯眯地看着那个宝宝问到。 
 She's a real sweetie pie. She would do anything for you. 她真的是一个小甜心。她什么都会为你做。 
  [ S ]小甜心 
used for talking to someone that you like or love 
  Come here, sweetie pie, give me a kiss.  过来,小甜心,亲我一下。 
 Happy Birthday, sweetie pie. I love you so much. 生日快乐,小甜心。我太爱你了。 
 Synonym: sweetie (PERSON)
 - More examples
 - She shared her memories of her sweetie pie editor, who had been so helpful.
 - What do you think, sweetie pie? Shall we buy it?
 - "I want to come too." "Oh no, sweetie pie, you'll be too tired."