School

1. An institution that educates children and teens on several subjects via practical, or theoretical experience.

2. A group of some smaller types of fish.

3. A place that Urban Dictionary writers clown on for several reasons.

1. "Gotta get this done for school, otherwise it's gonna get an E!"

2. "The orca feeds off schools of smaller fish in order to survive."

3. "You wake up at six in the morning to go to a building which resembles a federal prison. There, you go from class to class, repeating the same thing over and over..."

Twitter

A social media site well-known for being home to people who attack people for their opinions.
Like Reddit, but much worse.

Eren: "I'm gonna post why homophobia is an opinion, and why you shouldn't be attacked for it, on Twitter."
Daniel: "WAIT NO YOU'LL GET CANCELLED!"

>2 Days later...
Eren: "My Twitter account just got suspended..."
Daniel: "Ah well, Twitter is Twitter."