Sibling on sibling trolling is the best kind of trolling. 

1. This person made masks of their sister's fiance for their bachelorette party. This is what she walked into. Horrifying.

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malsapeach

2. This youngest brother took a selfie so naturally his whole family mocked it.

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pick_em_up_truck

3. This person's brother had to work, but they promised they'd fix him a plate of everything. They weren't technically wrong...

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Seely2593

4. When this person's friend turned 21, their little sister wrote them this heartwarming letter.

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billnyeisjustok

5. This was the welcome sign for his brother. His brother has never been in rehab.

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 ramblindan

6. The gift of family is the best gift of all, right?

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BearsOnABus

7. It's the thought that counts.

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Kiltek

8. This sister got this "gift" for their sibling's 18th birthday.

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Spoon1997

9. That's one cruel, cruel sister.

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smellypants

10. This sibling made a slight adjustment to their sister's Christmas photo.

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kurbs101 

11. This was the card someones sister got after giving birth.

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Bogsasaurus 

12. After this brother's store was robbed at gunpoint, his sibling gifted him this beauty.

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emzieees

13. This person wraps their brother's present like this every year. This year it's a gift card. Bravo.

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Pork_9