Rolled r or rolling r refers to consonant sounds pronounced with a vibrating tongue or uvula: Alveolar trill, a consonant written as in the International Phonetic Alphabet Alveolar flap, a consonant written as in the International Phonetic Alphabet Retroflex trill, a consonant written as in the International Phonetic Alphabet Uvular trill, a consonant written as in the International Phonetic Alphabet