 But the heart, to many, may be falling out of fashion. A survey of 2,000 people conducted by Prospectus Global showed that a majority of people between the ages of 16 to 29 believe that you are officially old if you use a thumbs up or heart emoji. Now apparently this list of outdated or passive aggressive emojis also includes, according to this study, it includes the okay hand, the poop emoji, the cringing face emoji, and the one with a monkey covering its eyes. All those are, you're not supposed to use anymore.