To act in an inept, clumsy or inexpert manner; to make mistakes.
To boom, as a Eurasian bittern.
To buzz, as a fly.
A bumble-bee.
A confusion; a jumble.
The Eurasian bittern.
To utter with a stammer, or with timid hesitancy.
To keep repeating a particular sound involuntarily during speech.
A speech defect whereby someone speaks with a stammer
The involuntary repetition of a sound in speech.