Top Definition
A word used to describe an outrageous purchase you have made while under the influence of a drug.
Wow. Forty-Seven cases of cheetos... What were you thinking?
My bad, it was a high-buy.
by EBBINGHOUSE January 03, 2009
that stupid shit that you buy while you're high.
-was that 100 pack of ball pit balls a high buy?

by ganjakoolaidman April 17, 2010
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