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1. A gurgling or bubbling sound, as of running water.
2. A rapid, excited flow of speech.
3. A separation in the boundary layer of fluid about a moving streamlined body, such as the wing of an airplane, causing a breakdown in the smooth flow of fluid and resulting in turbulence.
intr.v. bur·bled, bur·bling, bur·bles
1. To bubble; gurgle.
2. To speak quickly and excitedly; gush.
[Middle English burblen, to bubble.]