a 'compost heap' = ('chiefly US') a 'compost pile' [=a pile of plant materials that are kept in a garden and allowed to decay to create compost]
We 'compost' leaves in our backyard.
(..) Yo, yo, yo. Hey, guys, come on. We gotta go. We gotta go. Green is what? Good. Let's go. Guys, come on. Other bus, other bus. Let's go. Compost is cool. Now, stuff that in there, Eric. - Yes, sir. Yes, sir. - Very good, very good. Now, I am gonna make a steaming cup of compost tea. (..)2008 Twilight