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A condition where an upper and a downer interact, resulting in a total collapse under ones own body weight.
Brian was feeling good after a few vodka redbulls but once he ate that edible he totally McChanahanned at the bar.

What happened to Sasha last night? I saw her dancing but she went outside to smoke and she McChanahanned. We had to throw her in an Uber and send her home.
by The Asian Bone Crusher October 03, 2017
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