 Visit petsandpeopletogether.org to learn how to be a helper in your community. This has been a public service announcement brought to you by Maddie's Fund, the Humane Society of the United States, and the Ad Council. 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.