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adj. used to signify to a friend in public that you think a particular girl is sexable. meaning that you would fuck her with the 'lights on' rather than off.
guy A: did you see that latin chick? totally lights-on.

guy b: latin chicks are a lights-off for me dood.

guy A: what about asian chicks?

guy B: hellz yeah! spotlights-on!
Lights-On by BenSquared. January 11, 2009

lights on no one's home 

When someone is so fucked up that they're awake, but they're not really there mentally
Alex is so high right now, look at him - lights on no one's home

Alexa Lights On’d 

When someone comes over to another person’s house to have sex and then is just being a tease - the person who is being teased says Alexa lights on and tosses them into an Uber. 86’d kibosh
I had to « Alexa lights on » that one goodbye last night.

Did I just get Alexa Lights On’d?
Alexa Lights On’d by Mmmstorm June 28, 2018

Turn your lights on you idiot 

What you say to yourself when you see someone driving with their headlights off at night.

These people seem to not have a clue that the street in front of them is dark. The most likely causes of this idiocy are car gauges are automatically illuminated even with the headlight switch off making one think that their lights are on...or one thinks they have their switch on auto headlights when it is not.
Turn your lights on you idiot before you kill someone!!

The Ambulance has got it's lights on 

Phrase used to convey to the current occupant of a toilet that the speaker on the wrong side of the door is in urgent need to use the faculties. Time is of the essence in order to avoid an unfortunate episode of self pollution of the under garments. To convey in the fullest sense that an emergency is in progress and the current occupant should get out of the way immediately .
For crying out loud Love, put your lippy on downstairs.....I'm stood out here and the ambulance has got it's lights on

Ready lights on 

Nipples poking through a chick's shirt. Back in the day, B-52 bombers carrying nuclear weapons had a process whereby they would flip some switches to arm their bombs. Above each switch was a raised bulb that would light up when the bombs were ready to explode if dropped. A bombardier would say "Ready lights on" as a way to let everyone else know that he was ready to do some damage. The expression then came to be a way for aircraft personnel to call attention to nipples showing up the way ready lights would.
I didn't think it was cold out today, but that chick has her ready lights on.
Ready lights on by Craig56 April 26, 2007
More from Urban Dictionary
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
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