trip (someone) up 
phrasal verb with trip verb uk/trɪp/ us/trɪp/ -pp-
  UK 
  (FALL)      
  绊,绊倒(某人)
to fall because you hit your foot on something, or to make someone fall by putting your foot in front of the other person's foot
  I'm terribly sorry. I didn't mean to trip you up. 实在对不起,我不是有意要绊倒你的。 
 She tripped up on the rug. 她在小地毯上绊了一下。 
 - More examples
 - I tripped up on a piece of loose carpet.
 - He deliberately tripped me up.
 - She tripped up and dropped the tray.
 - He tripped up on the doorstep.
 - A fallen branch tripped me up.
 
  (FAIL)      
 informal(使某人)犯错 
to make a mistake, or to cause someone to make a mistake
  The exam went quite well, until I tripped up on the last question. 考试进展得很顺利,只是最后一道题把我难住了。 
 In the interview, they kept trying to trip me up. 采访时,他们一直想方设法让我说错话。