He looked at her and muttered something under his breath.

He muttered something under his breath and made to turn away, but I held him.

One of the dark men muttered something under his breath to those near him.

He muttered something under his breath and walked out of the room.

He muttered something under his breath but reached for the phone.

"She usually does," the press secretary muttered under his breath as he left the office.

In the end, he could only set off after her, muttering under his breath.

"Looks like things are coming to a head," he muttered under the cover of yet another beer commercial.

Muttering under her breath, she left to do as he had asked.

He saw that she was muttering something under her breath.