mod. vintage; from an earlier time; retro. (Generally positive. As in the well-established expression from the old school.) : His way of dealing with people is strictly old school.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
old-school (adj.)
in ref. to a group of people noted for conservative views or principals on some professional or political matter, 1749.
