Vermin Proofing Weep-holes 

I still don’t know the purpose of them haha I will have to look it up

​. They prevent too much moisture from building up inside and allows it to drain. Especially if it gets to freezing Temps it'll crack your brick from the inside

i found out when my bedroom flooded hahaha - yay me

You clearly don't understand the point of weep holes do you? Why do you think the masons leave them in the first place? Because they're sloppy or stupid?

No, do not ever fill the weep holes. It allows air movement and moisture drainage. They are required by building code.