What does rule 34 mean?

Im sorry if i tell you this but im a map:< (im not toxic or rude i just draw!)

Yay you back

Can u kill kitty_xiao🌸💫 next,(map,darkshipper,etc,etc, also have bleach prepared for when u go the its channel)

Came from the hater deck to comment: Why do haters need to suck d***s,especifically with c**