"Mwen pa di a, mwen pa di b." What's the meaning?

Mwen p'ap di "B", mwen p'ap di "C".
Mwen p'ap di "krik?", mwen pa di "krak!".
M p'ap di ni krik ni krak.
My lips are sealed.
I won't say one word.

Yo mennen l devan jij la.  Li pa di "B", li pa di "C".
They brought him to the judge.  He did not say one word.

Lè madanm ni ap babye, li pa di ni krik ni krak.
When his wife is babbling, he keeps his mouth shut.