No serious joke (and there's yet another oxymoron) site about the English language could be complete without a collection of puns. Here's one of them.
However, like most puns, the punchline of the following short conversation falls flat on its face if you are either too young to remember the popular TV series in the 1950's, or haven't seen the excellent 2013 big screen version (with Johnny Depp as Tonto).
Hey Tonto. Where are you going with that sack of garbage?
To the dump, to the dump, to the dump, dump, dump.