During the field trip, the chaperones were embarrassed by a few potty mouths in the group.

During the assembly, the bored students began to make mouths at the new substitute, whispering and snickering.

Despite the warning, the motor mouths at the table continued to trade rumors until the manager finally intervened.

When his boss criticizes him, he mouths off without thinking.

The vet examined the horses' mouths for signs of dental disease.

She bad-mouths her colleagues behind their backs even though she praises them in meetings.

The ornithologist examined the birds' mouths to check for signs of injury and disease.

The town grew tired of the flannel-mouths who promised prosperity but delivered only empty words.

The town grew weary of the flannel mouths who promised change but delivered only empty smiles.

The students were warned that dirty mouths would not be tolerated during the assembly.