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1.
The superband formed by Chad Kroeger of Nickleback and Scott Stapp of Creed in 2012. According to the Mayan's, the arrival of Creedleback will be the harbinger of the apocalypse.
Creed and Nickleback, or Creedleback, are the reason why today's rock is terrible.
by Abakes4bb June 15, 2010
 
2.
The name given to any band that sounds like Nickleback or Creed, who coincidentally sound exactly the same, and tend to get way too much airplay on commercial radio. Other bands who fit into this category are Five for Fighting, Three Doors Down, Rob Thomas
Have you heard Triple M's playlist lately, all they seem to play is Creedleback

Two Bogans are listening to Commercial rock radio
Bogan 1: Fuck I love Creed
Bogan 2: Mate thats Nickleback
Smart Person: It's Creedleback
by Junglecat187 July 22, 2009
 
3.
The combination of 'Nickelback' and 'Creed', two horrible bands that happen to sound almost identical. Can be used as an adjective to describe mediocre rock music, or a noun: the actual formation of a band combining Nickelback and Creed. The latter would surely be a sign of the apocalypse, and is probably used as a torture device in Hell.
BEHOLD! With the power vested in me by the dark god CTHULHU, I present to you: CREEDLEBACK! Cower in fear and terror!
by Rae D. Magdon June 17, 2010
 
4.
1. A Commercial Band that sounds like a million other bands often associated with the Cheesedick Rock genre. (See Nickelbreed)
2. Combination of Creed and Nickelback.
Bobby: Hey is that Yellowcard on the radio?
Roadskid: No, it's those other Creedle Backs.
Bobby: No shit, change it.
Roadskid: We're driving in the middle of nowhere there's nothing but Mexican music here... Mexican music it is.
by Big Bobbity November 15, 2007