A run of bad luck phrase
Used to refer to the period of time when bad things happen continuously.
Mary has just lost her job and broken up with her boyfriend. This must be her run of bad luck
After a run of bad luck, the girl became stronger and stronger
Don't worry, honey. If you have a run of bad luck anytime, we will be always by your side.
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.