When Haitians say machwa gonfle, do they refer to someone being mad?

It may refer to someone who's pouting.
L'ap gonfle machwè l.
He's pouting.

or if you've seen the term in the expression: Pale anpil fè machwa gonfle (Too much babbling will puff up your cheeks), it means Stop wasting time and act.  Pretty much the same as the expressions: Chita pa bay (sitting around don't give), or Twòp lapriyè fè jounou kwochi (Too many prayers make the knee crooked)

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