When a woman's nipples are obviously erect. Usually humorously called to attention.
"Honey, your headlights are on."
by tradesman March 31, 2003
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When a woman isn't wearing a bra.
I saw this girl at Farmers tonight... Her headlights were on.
by Joe Burns November 20, 2001
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seeing a womans nipples through a see through shirt
her headlights were shining through her shirt
by handle August 14, 2003
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When you can see a girl's nipples through her shirt, occurring most often on rainy or cold days
(rain falling outside)
Ben: Do you know what this rain means?
Paul: No, What?
Ben: Some girls will have their headlights on today.
by Sirk10 April 21, 2008
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The front portion of a car that emits a beam of light.
The headlights were so bright we could see the whole road.
by Perreault December 01, 2006
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