The word "stammer" refers to a speech disorder where a person has difficulty speaking smoothly and may repeat or prolong sounds or syllables. Full definition
Naked females smiled from posters lining the walls of cafes where sweat ran down the beer bottles and the bare chests of men sitting upon the stools, and prostitutes on the streets put their arms around the shoulders of stammering Mormon missionaries. (si.com)
Richard Stammers makes sure that the visual FX are not for FX sake as the threshold of believability is well maintained in the various textures of the render. (clothesonfilm.com)
With the introduction of the wireless radio, it becomes vital that Bertie is able to deliver a speech without stammering in order to save the monarchy from embarrassment. (totalpolitics.com)