"Thinkin" is a shortened version of the word "thinking." It refers to the process of using your mind to consider or analyze information, ideas, or situations.
Im a blackberry user and i was thinkin about getting the evo 4g but after toying with the torch for a little @ at & t im gonna wait for sprints version.... (bgr.com)
I'm 26 I do hair from time to time I'm thinkin on going back to school I'm fun sweet romantic outgoing silly I know how to have fun (meetsugarmommas.com)