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Hairstank is the gross smell of unwashed hair that’s been sitting on your head like a dirty blanket. It’s a mix of gunk, grime, and old shampoo that smells like a sewer rat took a bath in your pillow.
My mom’s hairstank could knock out a horse.
I walked into class and my friend’s hairstank was so strong I thought the teacher was wearing a fart mask.
My dog’s hairstank is nothing compared to my brother’s hairstank.