lim·er·ick /ˈlɪmərɪk, ˈlɪmrɪk/
  五行民謠
  Lim·er·ick n.  A humorous, often nonsensical, and sometimes risqé poem of five anapestic lines, of which  lines 1, 2, and 5 are of three feet, and rhyme, and lines 3 and 4 are of two feet, and rhyme. 
  Note: It often begins with "There once was a . . ." or "There was a . . ."; as --
  There was a young lady, Amanda,
  Whose Ballades Lyriques were quite fin de
  Siècle, I deem
  But her Journal Intime
  Was what sent her papa to Uganda.
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  Limerick
       n 1: port city in southwestern Ireland
       2: a humorous verse form of 5 anapestic lines with a rhyme
          scheme aabba