noun, na-adjective
out of tune; off-key; discordant
Describes music or singing that is off-key, or metaphorically something that is out of sync or not right. Often used in the phrase 調子っぱずれな音.
See also: 調子外れ (ちょうしはずれ)
彼の歌は調子っぱずれで、聞いていられなかった。
His singing was so off-key that I couldn't listen to it.
調子っぱずれなピアノの音が部屋に響いた。
The discordant sound of the piano echoed through the room.
More standard and formal synonym; 調子っぱずれ is a colloquial variant with the same meaning.
Colloquial form of 調子外れ (ちょうしはずれ), with the っぱずれ part likely a contraction of はずれ influenced by colloquial gemination.