n: a person who may not be fast moving or fast talking but who is making a difference in the world in their own way (possibly quietly and/or nearly imperceptibly). Akin to a trailblazer, except at a more relaxed pace. Responsive to snacks, kindness, reason, naps.
A person who drives so unduly slow, as to the point of idiocy.
Bob was reduced not only to tears, but also, intense road rage when two snailtards held up both the fast, and slow lanes of the main highway, only doing a mere 30 mph in a 55 zone.