1. A fake, popular girl; Term from the movie Mean Girls
, where the 'Plastics' is the popular girl clique. Make-up wearing people, usually critisized by 'punk rawkers' and other 'outcasts' ('tomboys', 'goths') for focusing on their appearences as the 'goths' slab on ten pounds of eyeliner and powder so they look pale enough to fit in. Have a whole group of followers, and wannabees. Just as many people who hope for revenge, but any people who spend so much time bringing them down don't really have lives.
2. Plastic surgury, such as breast implants or a nose job. Not usually referring to triple bypass surgury.
3. Credit cards.