shell-mouthed
adj.— «It’s just the two of them, shell-mouthed Ennis and voluble Jack, and for a while Lee’s movie has the homespun, companionable feel that comes from roasting hotdogs by the fire.» —“A tragedy of love, lies, silence” by Amy Biancolli Houston Chronicle (Texas) Jan. 27, 2007. (source: Double-Tongued Dictionary)
Further reading
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On a busy day in the emergency room, Alisa of Dallas, Texas, told an efficient colleague that she was really humming, meaning it as a compliment. Her colleague took offense, maintaining that humming meant “smelly.” Since the 18th...