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Following a relatively safe corridor through enemy anti-aircraft fire. Often used in conjuction with 5 by 5, meaning that the craft in question is either undamaged or has suffered very little damage.
by Macavity October 31, 2003
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1. Being in the process of doing a drug deal, or just being in the drug dealing business.
2. A state of being completely stoned or OD (overdosed for you dumbasses).
Joe (on the phone)- "hey dude, you wanna hang out later?"
Bob- "One minute man, I'm in the pipes."
by Spartanman June 07, 2007
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