noun
Refers to the state or process of something breaking down, falling apart, or being in ruins, both physically and figuratively.
崖の崩れに注意してください。
Please be careful of the cliff collapse.
彼の人生は
His life was a complete ruin.
noun, used as a suffix
has-been; wannabe
Used as a suffix to describe someone who was once something but has declined, or someone who aspires to be something but falls short. Often derogatory.
彼はアイドル崩れだ。
He's a has-been idol.
あの俳優崩れはまだ夢を追っている。
That wannabe actor is still chasing his dream.