I'm witted and I’m wildin
Frank Ocean is saying that he’s intelligent, a fast thinker, etc (meaning of “witted”)
Wildin' — Crazy, doing unordinary/extreme things, e.g “Y'all are wildin out”
“Witted” is also a homophone for “wit it” (as in “with it”). Therefore Frank is continuing the theme of juxtaposition from the last couple bars. To be “with it” is to be on top of things but he then says he is also “wildin” which are opposing ideas.
To help improve the meaning of these lyrics, visit "Blue Whale" by Frank Ocean Lyrics and leave a comment on the lyrics box