brush away
To remove something by applying a sweeping stroke to it or the surface it's on, typically with one's hand. A noun or pronoun can be used between "brush" and "away." I stood up and brushed the crumbs away from my shirt.
brush something away (from something)
to remove something from something by brushing; to get dirt or crumbs off something by brushing. He brushed a bit of lint away from Tom's collar. She brushed away the crumbs from the table.