Noun bugaboo has 2 senses
  1. bogeyman, bugbear, bugaboo, boogeyman, booger - an imaginary monster used to frighten children
    --1 is a kind of monster
  2. bugaboo - a source of concern; "the old bugaboo of inflation still bothers them"
    --2 is a kind of
    concern, worry, headache, vexation
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