James "Jim" Possible, and Timothy "Tim" Possible are twin brothers, and the younger siblings of Kim Possible. The name "tweebs" is a portmanteau of twins and dweebs, coined by Kim (The German form is "Zwombies", a portmanteau of "Zwillinge" (twins) and Zombies). Tim habitually wears red, Jim green. Name: Tim Possible and Jim Possible Trademark Sayings: "Boo-sha!" About: Kim Possible's twin brothers, whom she affectionally calls the "Tweebs" (Twin Dweebs), are distinguished by the color of the shirts they wear. One is often wearing red, while the other is often wearing green. When they're not harassing Kim, they're making trouble with their next whacky science invention, launching rockets, or sending out screensavers of an unexpecting Kim to all of Middleton.