ELI5: Explain Like I'm 5

Grand Slam (bomb)

Okay kiddo, so you know how in baseball, when a player hits the ball really far and all the bases are loaded with his teammates, it's called a grand slam?

Well, a grand slam bomb is kind of like that, but instead of hitting a baseball, it's when something explodes really big and causes a lot of damage.

It's called a "bomb" because it usually involves explosives that are set off on purpose, like a firework or a big bomb in a battle.

People use the term "grand slam" because just like in baseball, it means that it was a really big hit. When something is a "grand slam," it's usually the best possible outcome they could have wanted.

But of course, we don't want anyone to actually get hurt or for there to be any actual bombs going off, right kiddo? So let's just stick to enjoying grand slams on the baseball field!