bad hair day
1
a day on which one feels unattractive, particularly due to one's hair not looking as well as it should
The phrase "bad hair day" is believed to have originated in the United States in the 1980s. The expression is used to convey a sense of humor, self-deprecation, or light-heartedness when discussing one's hair looking messy, unmanageable, or looking less than desirable.
- During the event last week, he had a bad hair day and regretted not scheduling a salon appointment beforehand.
- She's having a bad hair day today, as her usually sleek and shiny locks are frizzy and unmanageable.
2
a day that is full of incidents and misfortunes
The origin of the idiom "bad hair day" is likely emerged from the idea that when a person's hair looks disheveled or unruly, it can negatively affect their overall mood and confidence. It is used to describe a day when everything seems to go wrong or is filled with unfortunate incidents and misfortunes.
- They had a bad hair day on their vacation, encountering unexpected weather, canceled plans, and lost luggage.
- Today feels like a bad hair day for him, with one mishap after another, from spilling coffee on his shirt to missing the bus.