Most people think stammering and stuttering are the same but they're as different as diarrhoea and constipation. Stuttering's when you say the first bit of the word but can't stop saying it over and over. St-st-st-stutter. Like that. Stammering's where you get stuck straight after the first bit of the word. Like this. St...AMmer!
Is this really true? Maybe - but even if it isn't, it should be.