trim off
1. To remove by cutting some small piece of someone or something else. A noun or pronoun can be used between "trim" and "off." I just want to trim off some of your hair in the back—I promise I won't do anything drastic! I decided to trim off my mustache.
2. To excise some element or aspect abruptly or suddenly. A noun or pronoun can be used between "trim" and "off." The company was forced to trim off healthcare benefits for its employees in order to stay afloat. My editor trimmed nearly 200 pages off my book, calling them "unnecessary"!
trim something off (of) someone or something
and trim something offto cut something off someone or something. (Of is usually retained before pronouns.) I asked the barber to trim the beard off of Ralph. The barber trimmed off Ralph's beard.
trim off
v. To remove some excess by or as if by cutting: I trimmed off the rotten wood. The barber will trim my bangs off.