noun
unlucky person; person with bad karma
Refers to someone who seems to be dogged by misfortune, often with a nuance of karmic retribution. Can be used sympathetically or critically.
彼は本当に因果者で、何をやってもうまくいかない。
He's really an unlucky person; nothing he does goes well.
因果者だと思われたくないから、努力している。
I don't want to be seen as a person with bad karma, so I'm making an effort.
不運 simply means 'bad luck' or 'misfortune' and is a general term, whereas 因果者 carries a stronger connotation of karmic destiny or a person fated to be unlucky.
Compound of 因果 (inga, 'cause and effect; karma') and 者 (mono, 'person'). The reading いんがもの follows standard rendaku voicing of 者.