 AdoptUSKids presents What to Expect When You're Expecting. A teenager learning the lingo. Jelly. Jelly adjective. Jelly is a shorter, better way to say jealous. As in, Chloe, I am like so jelly of your unicorn phone case. You don't have to speak teen to be a perfect parent. Thousands of teens in foster care will love you just the same. Visit AdoptUSKids.org. Brought to you by the U.S. Department of Health and Human Services, AdoptUSKids.