Webster's Revised Unabridged Dictionary · 1913

over-the-counter

over-the-counter , adjective

1.
able to be sold legally without a doctor's prescription; -- of medicinal drugs. Contrasted with prescription. [prenominal]
2.
(Finance) not quoted on a stock exchange; sold only through private negotiations between buyer and seller; -- of securities; as, over-the-counter stocks.

over-the-counter , adjective

Grossly excessive; outlandish; well beyond normal; as, over-the-top action films. [informal]

Also: over-the-top, over the top