bad hair day

"Bad hair day" is a slang expression used to describe a day when one's hair does not look or feel as desired. It typically refers to a day when hair appears untidy, frizzy, unmanageable, or generally problematic, regardless of efforts made to style or groom it. The phrase implies a temporary condition and is often used humorously to acknowledge and make light of a person's hair-related frustrations or self-consciousness.