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A Japanese insult that means you’re old enough to be a grandma, but still try to look cool with a fake bun and squinty eyes.
My aunt said 'ha ha koo nish nish' when I wore a wig to a karaoke bar.
He tried to look Asian with a headband and fake eyelashes. I told him 'ha ha koo nish nish.'
She pulled her hair into a bun so tight it looked like a donut. I laughed and said 'ha ha koo nish nish.'