also: トラのおをふむ
expression, godan verb (-mu)
play with fire; take a great risk; step on a tiger's tail
Idiomatic expression meaning to do something extremely dangerous or reckless, literally 'to step on a tiger's tail'. Often used as a warning.
そんなことをするのは虎の尾を踏むようなものだ。
Doing that is like playing with fire.
彼
He ventured into a risky investment, like stepping on a tiger's tail.