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1.
A traffic light that has been on yellow for so long it's about to turn red.

While you SHOULD stop, most people just gun it.
I wasn't about to stop for that orange light! I got places to be!
by Peter W.N. January 03, 2010
 
2.
The exact moment at which a vehicle enters the intersection while the light turned from yellow to red. Technically it's almost running a red light but it's up to the discretion of the observing traffic cop.
Damn fool! What are you doing running orange lights when I got Panama Red with us! That black and white nearly tripped when he saw us, idiot.
by BlackSunshine September 16, 2012