Flannelmouth
noun, slang
noun, slang ·Moderate ·College level
Definitions
Noun
- 1 One who speaks in an unclear, muffled, or sluggish manner. dated, informal
""Oh!—Oh!—Oh!" Bert screamed, with every blow she struck "Hey, old flannel-mouth! Watch out! You'll get yours in a second.""
- 2 One who speaks in a glib manner with the intent of deceiving or manipulating others. dated, informal
"Uncle Sedgwick, who is considered around and about as somewhat of a flannelmouth, has talked Drizzlepuss into going ice fishing. . . . Uncle can tell you some wonderful fish stories, but, boy, I've never known a guy who's so careless with the truth."
Example
More examples""Oh!—Oh!—Oh!" Bert screamed, with every blow she struck "Hey, old flannel-mouth! Watch out! You'll get yours in a second.""
Etymology
From flannel + mouth.
Related phrases
More for "flannelmouth"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.