Auxiliary lighting on most new vehicles that is to be used when the road is obscured by fog, snow or locust swarm. Also known as Loser Lights when turned on during the day or the weather is nice and sunny.
Losers are easy to spot these days, just go for a drive in clear weather and check how many fog lights are turned on. They are then known as loser lights and are the signature move of that group.
by Rykoshea September 2, 2020
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When a chick with saggy tits has her high beams on.
It must be really cold outside, when Fester came inside she had her fog lights on.
by BoomFizzle January 12, 2011
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1. A term referring specifically to a young woman's breasts that hang below the normal level, despite the fact that they are small.

2. Any small breasts.
1. "What's up with Rachel's boobs, man?"
"You mean her fog lights? Idonno, it's kind of weird."
"I still think she's hot."

2. "You know that Kennedy girl? She got drunk the other night and showed everyone her fog lights."
by Mister Squishy October 24, 2007
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A person who drives their vehicle with their fog lights turned on when there is no fog.
FUCKING FOG LIGHT WANKER!!!! (At this point it is necessary for you to put your full beam light on in order to 'blind the fog lamp wanker'.)

nb. Those who drive with their fog and side lights on without their dipped headlamp beam when there is no fog deserve and extra portion of road rage, feel free to sound your horn at these idiots.
by Charbear-Hodgedawg February 4, 2011
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alcoholic influence, typically followed by "blinders"...
yo jay had "fog lights" on last night when he hit travis...
by Jay Val March 15, 2007
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