A Noisy Oyster
What noise annoys a noisy oyster most? A noisy noise annoys a noisy oyster most.
Notice the sounds
Keep the two parts of /ɔɪ/ connected in noise, annoys and oyster. Notice that noise and annoys end with voiced /z/, while most begins with /m/.
Words in this expression
Source
Delight and Power in Speech, Leonard G. Nattkemper and George Wharton James (1919), articulation exercisesPublic domain in the United States; the pinned source includes the Project Gutenberg license.