Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Having a very excitable or nervous temperament; high-strung.
  • adjective Emotionally stimulated or overexcited.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective colloquial Short for hyperactive

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Short for hyperactive.]

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