It's a mix of "What is going on?" and "what are you doing later". This is a Southern term that is used quite often as a greeting in large social gatherings. "What are you thinkin?" would be a normal sentence to describe a greeting and ask what's going on later in the night. For instance, "what are you thinkin" may elicit an answer of "it's dead- let's go somewhere cool".
"What are you thinking?" "Stupid, let's go to another barl".
by Michael J Murphy February 26, 2014
A phrase that simple Nailogical uses
*finishes painting nails*

"What do you think?"
by Shakuraa February 4, 2019
A saying that some guys have that they say to a woman when she turns them down for a date or a request for sex.
Often a rhetorical question.
Kathy: No,I'm not going to date you.
John: What you think your better than me?
by Deep blue 2012 July 19, 2010
Term that people use when someone younger does something random, stupid, or uncalled for.
by sumguy91 July 31, 2012
What are your thoughts on them?
Friend: Hey, what do you think of me?
Me: I think you’re worthless
by drakesgf April 20, 2022
an old school slang word used to disapprove the actions or suggentions or another. the dates of the actually week is the 28th of january - 4th of february.
"can i go to the city with jack daniels?"
"absoulutley not, what do you think this is bush week?
by hayden595 February 28, 2008