The story
From lie + doggo, referring to the tendency of dogs to lie quietly and sleep lightly. Doggo is probably from dog + -o (colloquializing suffix).
Etymology from Wiktionary, CC BY-SA 4.0.
lie doggo
lie dog·goToday it means: To lie quiet and still in order to avoid detection; also (by extension), to stay hidden by being discreet and not drawing attention; to keep a low profile, to lie low. Full definition →