rugrat       
noun [ C ]  informal uk/ˈrʌɡ.ræt/ us/ˈrʌɡ.ræt/
 小孩;儿童
a child
  The rugrat is going to have a baby brother or sister. 这孩子会有一个小弟弟或者小妹妹。 
 The children's playroom is upstairs and over the garage, so the rugrats can jump up and down to their hearts' content.  孩子们的游乐室在车库的上方,所以他们可以尽情地蹦跳嬉闹。 
 - More examples
 - I've been on leave today looking after the rugrats.
 - Feature-length cartoons proved popular with moviegoers ranging from rugrats to grandparents.
 - We conned them into doing facepainting and generally entertaining the rugrats.