When a man or woman who are usually kept and well groomed suddenly goes on hiatus of personal appearance. The phrase itself comes from
the Groucho Marx who infamously sported huge untamed eyebrows.
For men
going with groucho is usually growing a beard, seize of all manscapping, and a newfound lingering odor.
For women its usually the stopping of any eyebrow
plucking, leg shaving, waxing, makeup wearing, or hair brushing.
Example:
Person 1: "What's been up with
Anna lately? She used to be so hot."
Person 2: "Yeah man I guess she joined some
feminist group and ever since she's been
going with groucho."