The lad stood open-Mouthed after Edwin had introduced them.
"The Mermaid of Druid Lake and Other Stories"
Charles Weathers Bump
Eliza looked at her open-Mouthed for a moment.
"My Lady of the Chimney Corner"
Alexander Irvine
The men you have known were close-Mouthed and suspicious, knowing that whatever they said was likely to be repeated, and this made them cautious.
"The Mystery of the Locks"
Edgar Watson Howe