The phrase "simple conceit" means having a simple and self-centered idea or opinion about oneself or something, usually without much thought or complexity. Full definition
Director Andrew Haigh's Weekend, Audience Award winner in South by Southwest's Emerging Visions section, has a deceptively simple conceit. (filmcomment.com)
It Follows is a horror film with a deviously simple conceit: There's a thing, and it will follow its target until it catches and kills the person. (markreviewsmovies.com)
Driving across most of the country's fifty states in an ordinary rental car, master photographer Lee Friedlander (b. 1934) applied the brilliantly simple conceit of deploying the sideview mirror, rearview mirror, the windshield, and the side windows as picture frames within which to record reflections of this country's eccentricities and obsessions at the beginning of the twenty - first century. (whitney.org)