a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.

a chattering or flighty, light-headed person.

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World English Dictionary

overactive (ˌəʊvərˈæktɪv)

—*adj*
1.	inordinately active
2.	(of the thyroid or adrenal gland, nervous system, etc) functioning at too high a capacity

Collins English Dictionary - Complete & Unabridged 10th Edition
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"He's got a fifteen percent metabolism with an overactive thyroid and a glandular affectation of about three percent. With a one percent mentality. He's what we designate as the Crummy Moronic type."

-Robert Pirosh

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