Grandmother's shock as she realises her 'pinstripe' pants are not what they seem

A grandmother who thought she'd bought pinstripe pants received a rude shock when her granddaughter pointed out the 'pinstripes' were, in fact, letters making up a very specific phrase.

The granddaughter, Chelsea, has shared the story on TikTok (@chels_bb) saying her grandmother arrived for a family gathering wearing a smart white blouse and the pants.

"My nana thought these pants were pinstriped," she says in the video.

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The camera then zooms in on the pants and the words 'f--k you' show up in white text across the black material, forming lines of text that appear at a distance to be stripes.

One of the grandmother's children can be heard in the background of the video explaining what her pants say, to which she responds: "Oh my God."

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The video has been viewed 9.1 million times by amused TikTok followers, many of whom are keen to purchase a pair of their own.

"I'd wear them constantly! Where'd she get them?" comments one.

"GIRL, NANA ON THE NAUGHTY LIST THIS YEAR," another person writes.

Another comment reads: "Nana will hear this story for the rest of her life."

"But we all wanna know where to get those," one person adds.

US comedian Chelsea Hander also comments, writing, "Whoopsiedoodle", leaving the the granddaughter, also named Chelsea, beside herself with excitement.

"Omg, fangirling, my whole family calls me Chelsea Handler," she responds.

"Nana is just playing it cool, she knows," another commenter writes.

"She's our Nana now," adds another.