Leaving something to others; relying on other people instead of doing it oneself.
仕事を全部他人任せにするのは良くない。
It's not good to leave all the work to other people.
彼はいつも人任せ（他人任せ）で、自分からは動こうとしない。
He's always leaving things to others and won't take action himself.
他人まかせにすると後で困ることが多い。
If you leave things to others, you often run into trouble later.