"Turn up"

Definition: Want to get this party started? Then you better turn up. After all, there is nothing teens love more than #parties (except maybe #selfies). Also can be used ironically.

Used in a sentence: "Did you hear Tracy is hosting an open house rager tonight? TURN UP!"

Columbia Pictures / Via memegifs.tumblr.com

"TBT" (When it isn't Thursday)

Definition: It's like the "Throwback Thursday" that is common vernacular for the rest of the Instagram-using world, except teens are edgy and use it on other days of the week. Throwback Thursday on a Monday? Now that is some hardcore stuff.

Used in a sentence: "TBT to dat time we were listening to Drake and drinking vodka from a water bottle in your parents' basement!"

Destiny's Child Vevo / Via perezhilton.com

"Grind"

Definition: Used to express you are in the process of doing something difficult. You have to be "on" a grind; it modifies the preexisting process you are discussing. After all, nothing is easy when you are a teen.

Used in a sentence: "I'm on that midterms grind, I have to study at the library this weekend!"

20th Century Fox / Via collegecandy.com