'Shrugging' is a gesture we make with our shoulders. Now I'm not strictly looking for synonyms of the actual gesture of shoulder shrugging, but rather words that convey the same emotion as when someone shrugs. Ideally, I'm looking for a verb.
I recognize there are many reasons to shrug: 2 main reasons being to say 'whatever' or to say 'I don't know'. I'm actually looking for both interpretations (it doesn't have to be one term for both). Again, I'm looking for synonyms for the meaning of the gesture.