no callarse ni debajo del agua

Meanings:

• 1.

  SpainLatin Americacolloquialinformal
  • Figurative: to be incapable or unwilling to keep silent in any situation; to speak continuously or refuse to be quiet.

• 2.

  SpainLatin Americaneutral
  • Literal: not to stay quiet even when under water (a hyperbolic literal rendering used for emphasis).