Happy birthday! May your day be filled with joy, laughter, and lots and lots of cake – because you're never too old for cake!

Happy birthday! Here's to another year of pretending to be normal when we're together!

Happy birthday to the one who makes family gatherings bearable – or at least more entertaining!

Happy birthday to the one who has the perfect blend of sweetness, craziness, and everything in between!

Happy birthday! May your day be filled with as much joy as the joy I feel when you're not around!

Happy birthday! May your day be filled with laughter, love, and all the things you pretend to like when I'm around!

Happy birthday! Remember, you're not getting older; you're just leveling up!

Happy birthday! Here's to another year of pretending to like each other – and doing a pretty good job at it!

Another year, another reason to be grateful that you're not an only child. Happy birthday!

Another year, another reason to be thankful that I have the coolest brother in the world. Happy birthday!

Another year older, wiser, and still as charming as ever! Happy birthday, bro!

Another year, another reason to thank our parents for not selling you when they had the chance. Happy birthday!

Another year, another reason to remind you that you're still not the favorite child. But hey, at least you're the funniest! Happy birthday!

Age is merely the number of years the world has been enjoying you. Keep spreading the joy, bro!

Happy birthday! Remember, you're not getting older; you're getting closer to looking like Mom and Dad!

Happy birthday to the one who's been my partner in crime, my co-conspirator, and my partner in annoying the rest of the family!

Another year older and still rocking it! Happy birthday, bro!

Happy birthday to the one who's seen me at my best and still loves me at my worst – my brother!

Age is just a number, but in your case, it's a number that's getting worryingly high. Happy birthday, bro!