grazer

One who or that which grazes, in any sense.

It seems likely that parents are free to respond in these different ways because they have no fear of their child growing into a chronic, adult knee-grazer.

An animal that grazes.

There were large hippolike grazers (Teleoceras, Brachypotherium, and Peraceras superciliosum)[…]

For instance, the little bush moa fed nearly exclusively on forest vegetation, whereas the heavy-footed moa was a grazer in open vegetation habitats.

A television viewer with a short attention span who switches between channels regularly.

Grazers have a lower level of involvement and view only when "something is happening."

A native or inhabitant of Graz.