noun
tiger's den; jaws of death; dangerous place
Idiomatic expression for an extremely perilous situation or location, often used metaphorically. Common in set phrases like 虎口を逃れる (escape from the jaws of death).
彼はまさに虎口から逃れたようなものだ。
He barely escaped from the jaws of death.
その作戦は虎口に飛び込むようなものだった。
The operation was like jumping into a tiger's den.