Lyric discussion by wikileaks 

hate to break it to you, but this song is about a man/some men who used to dress up as clowns and sneak into kid's bedrooms late at night and sexually abuse them.

the song is referring to the men and how they should be "buried alive" for the "moves they make"

the line "i will never be dirt-free" refers to the victims of the attacks and how its a scarring experience.

the verse about "up the stairs come find me" is particularly disturbing.

the only part i dont understand is the chorus about the leaves.

You're right, but the chorus about the leaves is referring to how it covers the earth, making it "dirty" and you can normally just rake them away, but this isn't something he can help them recover with.

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