Songs that all sound exactly the same, "hot" bandmembers, and just a pinch of teenage angst.
Their fanbase consists of just about every teenage girl in existence. You may recognize them by their inability to talk about anything other then the said band and their "awesomeness" and their insistence that everyone who does not listen to them is the biggest douchebag on earth.
Congratulations America, you have reached an all time low. Hence the name.
Teenage girl 1: ZOMG I LOVE ALL TIME LOW THEY'RE THE BEST EVER.
Teenage girl 2: YEAH I KNOW!!! WHAT'S YOUR FAVORITE SONG???
Teenage girl 1: IDK, THEY ALL SOUND EXACTLY THE SAME SO I CAN'T PICK LOLOLLOL
Teenage girl 2: YA I KNO!!! THAT'S THE BEST PART!!! AND ALEX IS SOOOO HAWT!!!
Teenage girl 1: OMG YA I KNO IMMA MARRY HIM SOMEDAY!!!