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What you on 

It typically means what are you down to do, sometimes referred to as a sexual term.
Example:

Her: “I like you”
Him: “alright so what you on”
What you on by Onroad militant April 24, 2019

what you on 

basically asking what you are about to get your self in to
Man i'm about to be on some freaky type shit
thats what you on
what you on by Te-Te Baby September 23, 2006

What you on?

A phrase used to ask what someone's true intentions are, typically in a hostile way
"Your shoes look like nice what size you wear?"
"What you on? We could Get active"
What you on? by monkeyballs2077 March 21, 2025

what you on about? 

meaning "what do you mean?"

it is a shortened version on "what are you going on about?" or "what are you talking about?"

usually used when someone is not making sense for extended periods of time or if you feel like you've missed something.

can be lengthened to show complete and utter confusion.
example 1.

knobhead: dude. i totally just pwned that n00b. i asdfghjkl; the ask;nfw. fo shizzle my nizzle dizzle.

awesome: what you on about?

example 2.

knobhead: so, tomorrow, then?

awesome person: what?

knobhead: we can go and you can meet them, yeah?

awesome person: what you on about?

example 3.
Gavino Free(roosterteeth): what you on about?
what you on about? by sammy sam November 18, 2013

what you on with 

what you on with by Yo mandem January 1, 2017

what you on tn 

what you on tn by cumsluttttt January 22, 2021
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
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