have a bad hair day

have a bad hair day

 
1. (humorous) to not feel attractive or happy all day because you cannot make your hair look nice I'm having a bad hair day today - I just couldn't do a thing with it this morning.
2. (humorous) if a machine has a bad hair day, it does not work as it should all day My computer's having a bad hair day.
See also: bad, hair, have
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From untamed frizz to lank locks needing a wash, there are plenty of ways we can have a bad hair day.
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