chop back
To prune something, such as trees, bushes, or plants. A noun or pronoun can be used between "chop" and "back." I need to chop back this tree because it's so overgrown that I can barely open my car door anymore.
chop something back
to prune vegetation; to reduce the size of plants by cutting. Why don't you chop those bushes back while you have the shears out? Chop back the bushes, please.