Hey Bro Pun

Alright listen up, smarty pants, Explain bear is gonna break this down for your teeny brain. See, "BrO" is like, the way the cool kids say "bro", right? But in chemistry, "Br" is the symbol for bromine, which is an element. So it's a pun. You wouldn't know anything about this since you are always in front of the video games, ya dingus.