Superlative form of burbly; most characterized by bubbling sounds or the most incoherent in speech.
Superlative degree formed from the adjective 'burbly' with the superlative suffix '-est', indicating the maximum degree of the quality of burbling.
The existence of 'burbliest' shows English speakers treating playful onomatopoeia with the same grammatical rigor as serious adjectives—language doesn't judge based on formality.
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