beard the lion in his den
US /bɪrd ðə ˈlaɪən ɪn hɪz dɛn/
UK /bɪrd ðə ˈlaɪən ɪn hɪz dɛn/

1.
深入虎穴, 在敵人的地盤上對抗
to confront an adversary on his or her own ground
:
•
He decided to beard the lion in his den and confront his boss about the unfair treatment.
他決定深入虎穴,就老闆的不公平待遇與他當面對質。
•
Despite the risks, she chose to beard the lion in his den and present her controversial proposal directly to the board.
儘管有風險,她還是選擇深入虎穴,直接向董事會提交她有爭議的提案。