A girl who is fake i.e. wears lots of make-up and is a real fucking bitch who thinks shes the best and so popular. Usually dumb and 99% fake.
plastic spastic 1: hey babe
plastic spatic 2: hey hunni, omg i dont think im wearing enough fake tan and make-up im only wearing like 4 layers or make-up
plastic spastic 1: yeah babes, omg did i tell you that i fucked that guy the other day?
plastic spastic 2: omg yeah haha *flicks fake hair*
plastic spatic 2: hey hunni, omg i dont think im wearing enough fake tan and make-up im only wearing like 4 layers or make-up
plastic spastic 1: yeah babes, omg did i tell you that i fucked that guy the other day?
plastic spastic 2: omg yeah haha *flicks fake hair*
by lilly.x December 16, 2011
A person who can't control their spending on credit cards, debit cards, store cards, or any other type of plastic.
Husband: Another credit card AND you've maxed out the four you already have?!
Wife: I can't help it!
Husband: You're just a plastic spastic.
Wife: I can't help it!
Husband: You're just a plastic spastic.
by Eternal Requiem December 10, 2009