feel someone up 
phrasal verb with feel verb uk/fiːl/ us/fiːl/ felt | felt
  slang mainly US (UK usually touch sb up)      
 猥亵
to touch someone sexually, especially someone you do not know, for your own excitement
  That's the second time she's been felt up on the Metro. 那是她第二次在地铁里遭到猥亵了。