warble

Noun

• a lumpy abscess under the hide of domestic mammals caused by larvae of a botfly or warble fly

Verb

• sing by changing register; sing by yodeling
  • The Austrians were yodeling in the mountains
    

• sing or play with trills, alternating with the half note above or below

Related words

• Synonyms: 
  yodel , descant , trill , quaver