Any one of numerous species of small rodents belonging to the genus Sciurus and several allied genera of the family Sciuridæ. Squirrels generally have a bushy tail, large erect ears, and strong hind legs. They are commonly arboreal in their habits, but many species live in burrows.

a kind of arboreal rodent having a long bushy tail

an arboreal rat with a fluffy tail (unflattering, but true)

a rat in a cuter outfit

a rat with happy cheeks

a rodent and as nature would have it their teeth grow all the time

a rodent that lives and nests in the trees

a small rodent with a large bushy tail, found in most countries of the world

a nervous or unstable rider who can't be trusted to maintain a steady line.

A small rodent, but also a rider who is erratic and 'squirrely' when riding in a group.

An abundant, largely tree based rodent. Red and gray squirrels are commonly eaten in the U.S. The gray squirrel is fatter and has a flavor considered by many as superior to the red squirrel. Contrary to popular belief Squirrels only have a strong "gamey" taste if "hung".