1 definition by Youraveragepeacefulstoner

The feeling of high you get a period of time after you smoke a decent amount of weed. Hash Flash could consist of light headed-ness, dizzy-ness, impaired balance, inability to form words and other symptoms specific to the user. Usually a hash flash only lasts for 25-30 seconds, but can last for as long as 4 minutes. Hash flashes could take place anywhere from the day after you smoke weed, to a 3 days after you smoke weed. maybe even longer (depending on the user).
Mom: Honey i need you to mow the lawn...

Child:**under breath**...Shit how am i gonna do that if i keep getting these damn hash flashes...
by Youraveragepeacefulstoner June 16, 2010

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