verb

• (onomatopoeia, especially of a fish) To blow air bubbles or audibly slosh about in water.
  "The ducks quack, The birds chirp, The fish bloop."
• (baseball) To make a hit just beyond the infield.
• (informal) To produce a low-pitched beeping sound.
• (television, transitive) To cover up splices in a soundtrack tape to eliminate the unwanted noise they may produce.
  "Optical track can be blooped by using blooping tape, which is available from motion picture equipment dealers."

noun

• (onomatopoeia) The sound of a fish blowing air bubbles in water.
  "Slowly exhale using short, quick bursts through the mouth, making 'bloop' sounds to mimic a fish each time."
• (onomatopoeia) The sound of something, especially a fish, sloshing about in water.
  "A loud bloop bloop from the fish tank made me jump, the three-year-old Reader’s Digest almost slipping from my grip."
• (informal) A low-pitched beeping sound.
  "The robot produced a series of beeps and bloops before giving its answer to the problem."
• (slang, baseball) Synonym of blooper.