where that anger of yours will get you if you don't rein it in

rein in 驾驭，控制
在该处，如果控制不好，你会来火的！

1. (用缰绳)勒住[(+in/back/up)]
The officer reined in his horse at a crossroads.
军官在十字路口勒住了马。

2. 驾驭;控制,统治[O][(+in)]
You must learn to rein in your temper.
你必须学会控制你的脾气。