Nothing disgusting or dirty, just BAD. We're talking grade school Scholastic book humor level. In fact, that's where I remember many of these from.
http://onomatopoeia.org/index.php?type=misc&item=59.jokes
(I just finished the page, there is some language at the end.)
http://onomatopoeia.org/index.php?type=misc&item=59.jokes
(I just finished the page, there is some language at the end.)