Is this definitely a good joke?

Question

A nursery school teacher says to her class, "Who can use the word 'definitely' in a sentence?"
First a litte girl says, "The sky is definitely blue."
Teacher says, "Sorry, Amy, but the sky can be gray or orange."
The second little boy says "Trees are definitely green."
"Sorry, but in the autumn, the trees are brown."
Little Johnny, from the back of the class stands up and asks, "Does a fart have lumps?"
The teacher looks horrified and says,"Johnny! Of course not!!!"
"Okay. Then I DEFINITELY **** my pants."

Answer 1

yes this is funny

Answer 2

Ewwww! Funny though! 9/10!

Answer 3

ha ha!