1. the time by which something must be finished, submitted, etc. 2. (formerly) a boundary around a military prison beyond which a prisoner could not venture without risk of being shot by the guards.
While it's important to talk with your doctor about the cause of your slurred speech, slurred speech caused by anxiety is not dangerous. It's not a sign that you have something else coming, or that your brain will somehow be inefficient for handling life tasks in the future.
I took him to the Neurologist because he began to have slurred speech and seemed to be unsteady on his feet and fell several times. They did a brain scan and said it was fine but the Neurologist said the speech problems and instability was caused from remote effect of the prostrate caner cells. He said he did not have brain cancer but just the cancer cells was causing this to happen in his brain.