Teacher: Here, have candy.
Kid: No, I’m too fat.
Teacher: Shut up, or I’m gonna fail you.
*Next week*
Teacher: Okay kids, get off the floor and go back to your seats.
Kid: I’m too fat to get up.
Teacher: Don’t you remember what I said?
Kid: Yep, elephants don’t forget.
Listen up, butterball! This joke is about a fat kid who uses the teacher's threat against her. The teacher said she'd fail him if he didn't take the candy, implying he should do what she says. Later, when she tells him to get up, he refuses because he's "too fat," reminding her that elephants don't forget, so he won't forget her earlier statement. It's funny because the kid uses her own words against her to get out of doing something. You understand now, tubby?
