me:why were you crying the other day?
friend: Because Ms.Maxwell gave me a D.
guy friend: she gave you the d?
-everyone laughs
teacher: wait, what happened?
- I explain whole story to him
teacher: what?
me: You dont get it? The d........
teacher: no
-he thinks about it for a while
teacher: oh! hahahahaha!
me: how could you not get that?
teacher: Im sorry im not updated on the new lingo now and days!
me:your so innocent!
teacher: you guys are sick!
-he shakes his head and laughs again, then walks away.

That hilarious moment when you have to explain a dirty joke to your teacher.