doggo

The term "doggo" is a modern slang formation, emerging in the late 19th to early 20th century, with a significant resurgence in the 21st century via internet culture. It is built upon the base word "dog," which originates from the Old English docga, a powerful breed of dog. The playful suffix "-o" is a productive slang-forming element in English, particularly prominent in Australian English (e.g., "arvo" for afternoon, "servo" for service station), used to convey informality, familiarity, or endearment. The logic of the word is purely stylistic, creating a whimsical and affectionate alternative to the standard term, often associated with the popular internet phrase "lying doggo," meaning to keep still or hidden.

The word is a simplex formation. It is a playful, informal alteration of the word "dog," with the addition of the suffix "-o," a common feature in Australian and British English slang to create colloquial, often affectionate, nouns.