Definition of flannelmouth in English:

flannelmouth

Syllabification: flan·nel·mouth
Pronunciation: /ˈflanlˌmouTH
 
/

noun

North American informal
A person who talks too much, especially in a boastful or deceitful way.

Definition of flannelmouth in:

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Word of the day humoresque
Pronunciation: ˌhjuːməˈrɛsk
noun
a short, lively piece of music