UK slang ~ a cocaine induced comedown.

Little Mrs:'Owww cmon u gotta go to work today'
Nosebag Nick: 'cant face it, been out on the marching powder all weekend and i'm coming down with the bolivian flu'
by HerbHermit May 21, 2007
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The general run-down state a female finds herself in after a long weekend sniffing cocaine, or Bolivian marching powder, with symptoms such as drowsiness, headache, nausea, blocked nose, sore throat, chills, fever, general discomfort, which may mimic those caused by the influenza virion but are actually the downside effects of a weekend of high hedonism.
Female 1: Where's Jen tonight?

Male: She's still in bed with a bad case of Bolivian bird flu after hitting it hard last weekend.
by Ben H. Patrick December 15, 2012
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