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".

A phrase that simple Nailogical uses

Term that people use when someone younger does something random, stupid, or uncalled for.

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.

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.

A person who believes that pulls. Hhha
Yeah he's the man and not even.