To try to help but inadvertently make things worse; to do more harm than good.
小明想帮忙修理电脑，结果却把系统弄崩溃了，真是帮倒忙。
Xiao Ming wanted to help fix the computer, but he ended up crashing the system, which was truly more of a hindrance than a help.
Era:
Modern
Frequency:
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