Let it be known, I have the coolest siblings, bar none.
If you think you can beat them, let me know. But first, you have to tell me how on earth you plan on taking over the world.
Then, make me laugh. Then, sing "Alleliua" in four-part harmony like the Slabaugh-Von-Trapps. Then, talk about topical map underwear.
Anyway. Try it, I dare you.
Hey, my siblings are the coolest too!
(but wouldn't everyone say that about their siblings?)
You can claim you have the coolest siblings when you have dangled a sibling off the side of the roof suspened by dog leashes while the rest are cheering and whistling. Try it. I dare you.
Or you can gang up on one of the siblings, kidnap them, blindfold them, and MAKE them get a haircut because their hair is boring. (Dyeing it bright red also counts.) Or you can play enthusiastic "air band" (drums, guitar, lead singer, and backup) in the car at the stoplight, letting the amused jeers of neighboring cars serve only to spur you to new heights. Or you can all pretend to be rednecks and stick your feet out the windows while driving along (including driver). Or you can make one of them wear a tiara for the entire weekend of their birthday. Or you can try to convince anothet set of siblings (brothers!) that getting their hair highlighted and toenails painted is really a good idea.
And if you manage to do all these things, then you might be considered for "cool siblingness."