Rafe and Leo make a reference to "expertly drawn boobs" in Rafe's sketchbook, then wonder how realistic the boobs were. Nothing explicit.

Principal Dwight says that some of the tests have the question: "true or false: Principal Dwight has three nipples." He denies it, saying he was born without nipples and it looks amazing, but nothing is shown.

Principal Dwight is covered in manure in one scene.

A boy says his stepmom is really hot and Principal Dwight adds "I've seen his stepmom. He's not kidding."

As Rafe tampers with the school's sprinkler system, Leo says "if you fall, I am not giving you mouth-to-mouth."

A two-headed alien accidentally shoots its heads off, but they quickly regenerate. No blood.

Colored spheres fall out of a closet and pin Vice Principal Stricker to the floor, and Principal Dwight remarks "Oh my God. That could have been me." In later scenes she is fine.

"Oh, shit" was almost said, but was cut off.

A kid says to Rafe "welcome to hell".

One use of 'pissed off' by one of the middle school kids

During a speech to Rafe, Leo asks what rhymes with "suck", and Rafe states "Nothing good" referring to the F- Word

A few uses of the word "crap"

5 uses of "crap," 1 use of hell, 1 incomplete use of "shit," ("Sh" can be heard, but the rest was cut off", 1 use of pissed, 3 uses of sucks, 2 uses of screwed, 1 use of "freaking", 6 uses of "god" in vain. A couple slang terms were also said: Boobs, balls.

A man says "What the f-- fish"! , implying that he was going to say the f word.

Leo says that he learned how to curse in 13 languages from Call of Duty.

The film contains some mild coarse language such as the terms "kick your butt" and "screwed".

In one doodle animation sequence, Rafe is chased by scary zombies that move in formation and then a monstrous school building that inhales people while pulling itself forward with its teeth, the ground in front of which is a scantron. There is some comic relief as a locker is at maximum nerd capacity and the zombies imitate a zoetrope, but still this may be intense for younger viewers