spastic

adj

1. Of, relating to, or affected by spasm.
2. Of or relating to spastic paralysis.
3. (colloquial, derogatory, offensive)Incompetent or physically uncoordinated.
4. (colloquial, derogatory, offensive)Hyperactive or behaving erratically.

noun

1. (especially, offensive)A person affected by spastic paralysis or spastic cerebral palsy.
2. (colloquial, derogatory, especially, offensive)A stupid, clumsy person.

   “‘Oi, Fleming, you spastic. Guess who I knobbed last night?’”

   “Jed Maxwell: See you next week then. We'll have that pint. Alan Partridge: Yep. Jed Maxwell: ...go and see my brother. Alan Partridge: No way, you big spastic! You're a mentalist!”

   “Tracy Turnblad (Nikki Blonsky): Show Link! This is nuts—she can't even dance. Penny Pingleton (Amanda Bynes): Plastic little spastic. Tracy Turnblad: Oh, Link, I can dance so much better than her. Penny Pingleton: Mhm! Tracy Turnblad: Why don't you notice me at school?”