Top Definition
when a girls hair is incredibly unkept because of going to sleep drunk after a night of partying. not uncommon is to find little pieces of food and clumps from drooling while sleeping.

this most often occurs on friday after a late thursday night but the girl is to lazy to do her hair because she knows she will have to when she goes out again later that night.
tony: omg look at that coke addict, she looks a little like sara, that whore deff has aids

rachel: no, that IS sara, looks like shes suffering from a case of friday hair
by itaub1 May 19, 2009
5 Words related to friday hair

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