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The bubbly sound a guinea pig (cavy) makes when it is happy.
"I heard a frobble from my guinea pig's hutch."
"The guinea pig frobbled contendedly"
by Glaucon August 29, 2006
frolicking and hobbling at the same time.
The dwarf frobbled across the lawn with a crutch in his hand to the music of his own mumbling.
by Evans Atwood January 22, 2004