What does shooken up mean?

Shooken up is a non-standard past participle form of the phrasal  verb “shake up.” The standard form is shaken up.

If you feel “shaken up,” you feel “shocked” or “upset” (e.g., “It was only a minor accident, but I was still shaken up”). When “shaken up” is used like an adjective in passive constructions like this in informal contexts, “shook” is sometimes used as an alternative past participle form (e.g., “I was a bit shook up at first”).

QuillBot’s free Grammar Checker will help you to pick up errors like “shooken up” instead of “shaken up” in your writing.