get in someone's face

get in someone's face は挑発、対峙する時に使われます。 0:55 the student kept going off (on) the employee, getting into his face and cursing. and then began getting physical. この生徒は学食の職員に当り散らし、やるかと挑発して、どつき始めた。

Drunk Student Arrested After Being Denied Bacon Jalapeno Mac and Cheese
https://www.youtube.com/watch?v=Rnssh5d9ojw  0:59 your job, get in the other's face. お前のやることは、相手のタコに立ちはだかって追っ払うことだ。
The Weird World of Octopus Sex

1;04 this guy is just walking up to me, he basically got in my face. 向こうから近づいて来て、いいががりをつけてきた。

Man harasses woman for wearing Puerto Rico shirt

参考リンク
http://bridge-english.blogspot.com/2014/01/in-face-of.html  in the face of