As a noun dog
is a mammal, canis lupus familiaris
, that has been domesticated for thousands of years, of highly variable appearance due to human breeding.
As a verb dog
is to pursue with the intent to catch.
As a proper noun gorilla is
Digital on-screen graphic
Digitally Originated Graphic
The largest of the apes, native to the forests of central Africa, and known for its trait of knuckle-walking
A big and brutish man or a thug; a goon or ruffian.