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A covert way to tell a person to screw them self, or a way to insinuate that a man is literally screwing them self. 270 is the angle of the penis necessary to perform such maneuver, hence the brief and scientifically perfect synonym for an otherwise vulgar gesture. It is also a great way to respond to a person who is bragging about them self.
1. Oh really, did you do that with our without your 270 in action?

2. Really buddy, just go 270 in your room and get it over with. We already know.

3. Hey pal, go 270 yourself. Dry.
by Green eggs and baaaam December 31, 2012
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2
A car that doesn't have air conditioning so the front windows are down and the driver goes 70 miles per hour to providing cooling for all occupants.
The driver of the old car was accustomed to the 270 air conditioning system.
by Bryan M. July 10, 2006
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3
a 180ΒΊ turn with a 90ΒΊ turn...270
by ible September 13, 2003
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4
An interstate in Maryland that can get backed up at any time even though it is 6 lanes on each side at one point.
It's a miracle, no traffic!
by lazylatvian May 07, 2005
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