So this joke is horrible. But my dad told me it when I was like 4 years old and I still vividly remember actually rofl-ing. I also don't know if it translates well since I do not know if the "tongue" of the shoe has the same meaning in English as it has in german, but here it goes:

A guy comes into a shoe store and wants to try on a shoe. The clerk gives it to him and the dude is like "It doesn't fit, man". The clerk tells him that he has to put the tongue out, and the customer replies: "Bwell ith still doeshnt fith".

Actually this one works so much better in real life.