To dig or root around aimlessly (in or through some cluttered location) in order to find something. A noun or pronoun can be used between "around" and "for" to specify where one is looking. Usually used in the continuous tense. I think Tom's rummaging around for something up in the attic. A raccoon had gotten into the dumpster and was rummaging around for something to eat. I caught my brother rummaging around my purse for money again.