Waterytongued
Waterytongued is an informal and somewhat dated adjective used to describe someone who speaks with excessive or a wet-sounding articulation. It suggests a tendency to produce too much saliva while speaking, leading to a slurred or less distinct pronunciation. This can manifest as a slightly "spitty" quality to the voice.
The term is generally not used in formal contexts and is more likely to be found in
While the exact origin is unclear, the "watery" aspect clearly relates to the presence of excess liquid