cross sb [看美剧学俚语 Loki s01e01]

You cross me, there are deadly consequences.

你敢惹我  后果很严重

cross  verb 惹,招惹,惹恼,惹怒 irritate upset
美 [krɔs]
英 [krɒs]

to annoy someone by not doing or saying what they want:
I wouldn't cross him if I were you, not if you value your life.