You're definitely right about Panic! At the Disco! Here are some other ones:
OK GO (Okay, I'll go. LOL)
Fall Out Boy
My Chemical Romance (Dude, it's just not safe to be having a romancce with chemicals.)
Bowling For Soup
Foo Fighters (Just think about if they had all decided to name themselves the Poo fighters...Yeah, let's all fight with poo! Yah!)
Nickelback (All I see on the backk of a nickel is a really retarded lookin building, and if you're lucky, a buffalo or some trees. Still they rock. Hey- are they calling themselves buildings, trees, and Buffaloes?!)
Beastie Boys
Maroon 5 (Though that name is kinda cool.)
Alien Ant Farm (Hey, who knew there were such things as alien ants?! And who in their righ tmind would put them on a FARM?!)
Rat Poison ( So I guess they're kinda like the American, present-day Pied Pipers.)
That's all 4 now! Seriously, how much weirder could you get?