a three-toed sloth, Bradypus tridactylus, inhabiting forests of southern Venezuela, the Guianas, and northern Brazil, having a diet apparently restricted to the leaves of the trumpet-tree, and sounding a high-pitched cry when disturbed.
exclam. an expression said when someone says something that is not true but wishes that it were. (Also, and perhaps usually, sarcastic.) A: I've got a whole lot of good qualities. B: AI! : My hair should look like a pile of wet thatch? As if!
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Medical Dictionary
Main Entry: AI Function: abbreviation artificial insemination