On Monday, Oct. 21, the SKIMS founder shared a video of her daughter North, 11, gifting her a diamond necklace for her 44th birthday — which displayed a very strange engraving on the front.

Kardashian showcased the sparkling piece of jewelry in a video posted on her Instagram Stories. “North got me this diamond necklace that says ‘Skibidi Toilet.’ Wow,” she said, laughing.

She then zoomed in on the necklace while holding up the rectangular-shaped pendant to get a closer look at the unique engraving.

Skibidi Toilet is a viral computer graphic web series on YouTube created by Alexey Gerasimov on his channel DaFuq!?Boom!. The plot of the animated series follows a fictional war between human head toilets and humanoids.

Kim Kardashian/Instagram

The back of the necklace North West gifted to her mom Kim Kardashian

As Kardashian continued to hold her necklace, North said, “And ‘Love North,’” describing what was engraved on the other side. Kardashian flipped the pendant over to show the engraving, which also featured the date the necklace had been gifted beneath North's message.

North then said, explaining the gift, “Because you love Skibidi Toilet.”

“I do?” Kardashian laughed. “Yes!” North replied.

Kim Kardashian/Instagram

North West' 'Skibidi Toilet' necklace for her mom Kim Kardashian

Earlier in the day, Kardashian shared a glimpse into her birthday celebrations at home as she posted more videos.

In one clip, she revealed that her four children, daughters North and Chicago, 6, and sons Saint, 8, and Psalm, 5, put up balloons with messages and photos attached of the family together as a sweet birthday surprise.

“Look what Chi Chi and the kids made for me. They made me balloons but with hanging messages and pictures of each of us,” Kardashian said while filming her dining room as dozens of pink and white balloons with streamers attached filled the ceiling.

Kim Kardashian/Instagram

Kim Kardashian's daughter Chicago alongside her birthday balloons

She then picked up some of the photos of herself with her kids and their handwritten birthday messages and showed them to the camera as she walked around the room.

“These are so cute. I love this,” Kardashian, who shares her four children with ex-husband Kanye West, said reading some of them aloud.

Kim Kardashian/Instagram

One of the photos attached to the balloons

In a following video, Kardashian filmed some of her birthday balloons displaying photos of her face stuck on them in another birthday surprise.

“North, did you make these balloons?” She asked. “I didn’t make them … but I bought them for you!” North replied.

Kim Kardashian/Instagram

Kim Kardashian's birthday balloons

The day before, Kardashian showcased herself wearing a skintight nude dress, which she coined her "birthday suit," as she attended an early birthday celebration on Sunday, Oct. 20.

She wore Diesel's D-Rooney slip dress for the occasion, which features a fitted bodice over a semi-sheer skirt and retails for $2081.