If something is skitterier, it moves quickly and with small, light steps, like a bug or a small animal.
Skitterier can make people think of things that are fast, small, and maybe a little bit nervous.
Examples:
The mouse is skitterier than the turtle.
The bug is skitterier than the snail.
She is skitterier than her big brother.
The cat is not skitterier than the rabbit.
The skitterier the bug, the harder it is to catch.
The skitterier the animal, the more fun it is to watch it move.