The new words/idioms (20210318)

The new words I've learned today(20210318)：
1)Demagogue/Demagoguery：煽动者，煽动家/群众煽动，煽动行为
2)push someone's button：make someone upset or angry 惹人生气😒
3)dilly dally：磨蹭
4)that ship has sailed：为时已晚
5)going commando
6)shamrock：三叶草clover
7)eucalyptus：桉树，尤加利树
8)it didn't cross my mind(that)：I have no idea我没想到
9)right off the bat：immediately 首先，立即the first thing that comes to your mind
10)Grief can eat us alive. 忧伤能把我们活活吞噬掉。