Be at a crossroads phrase
To be at a stage where an important decision has to be made
I don't know whether I should follow my parents' dream or my passion. I'm totally at the crossroads.
If you are still at a crossroads, seek advice from your teachers.
This phrase may come from the literal meaning, implying standing in the crossroads, the intersection of two roads.
To punish someone or something harshly
He's a really strict teacher, so he'll definitely lower the boom on you if you don't do your homework.