the.com/stammering
When your brain is fluent but your mouth keeps requesting a buffer.
means Speaking with involuntary pauses or repeated sounds, especially at the start of words.
from From Old English stamerian, kin to German stammeln, rooted in a sense of being hindered or impeded — stuck, basically.
Royal stutterGeorge VI's struggle won an Oscar in 2010.
Same thingStammering and stuttering are largely interchangeable terms.
Sing it outMost people who stammer can sing flawlessly.