The daily rhetoric of teachers is a combination of a wide variety of emotions: frustration, confusion, astonishment, and exhaustion, just to name a few.
We say things that would be extremely unusual or even unacceptable, in any other context.
But it's part of the struggle, the misery, the piles of responsibilities placed on our shoulders without enough time, enough help, or enough pay. If you're a teacher, you know what it's like to spend day after day battling all the obstacles of our educational system. If you're a teacher, you know what it's like to be responsible for way more pubescent adolescents and hyper-active children, than ANY single human should be responsible for.
If you're a teacher, you understand. And you'll find all the lines in the following video Things Teachers Say terribly familiar, just like the 15.3 Million people who watched it on Facebook! Enjoy :)