To invite trouble by relying on dangerous people or methods for protection; to set a trap for oneself; to try to protect oneself by relying on a dangerous force, only to be harmed by it.
他以为请那些不讲规矩的人来帮他，就能解决麻烦，没想到却是引虎自卫，惹来了更大的麻烦。
He thought inviting those who disregard rules to help him would solve his problems, but it turned out to be "inviting a tiger to defend himself," leading to even greater trouble.
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