Top definition
A North Sea (UK) Oil rig that accidentally blew up in 1988.

alternatively, the slang term for a typically massive bong of Middle East origins with at least 4 hoses to entertain the purpose of smoking hashish.
'fire up piper alpha dude'
by Emperor Xist January 27, 2006
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2
Military term used for when the weather is exceedingly hot.
Man, it's piper alpha out there today!
by kr1305 May 27, 2010
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