You Are My Bootjack

Come on, bootjack - you are now going to fulfill your special task and munch my dirty boots clean. Get out your tongue and gobble - do you get it? Youll gobble my boots only from the bottom, though, only the dirty sole. Dont touch the rest - just the dirty sole and heel. And youll lick it all - no matter what a dirty mess got stuck down there, you are going to swallow it, all the dirt!