boo-boo

from WordNet (r) 3.0 (2006)

boo-boo
    n 1: an embarrassing mistake [syn: {blunder}, {blooper},
         {bloomer}, {bungle}, {pratfall}, {foul-up}, {fuckup},
         {flub}, {botch}, {boner}, {boo-boo}]

from The Collaborative International Dictionary of English v.0.48

boo-boo \boo-boo\ n.
   1. an embarrassing mistake.

   Syn: blunder, blooper, bungle, foul-up, flub, botch, boner,
        misdoing.
        [WordNet 1.5]

   2. a minor injury, such as an abrasion on the skin; --
      child's talk.
      [PJC]