Badly Fitting Shoe

Listen up, buttercup. This joke is all about twisting words. Usually, if the shoe fits, it means something is true or fits perfectly, right? But this joke flips it to mean if the shoe *doesn't* fit, then you can't use it as evidence. So basically, someone is trying to be sneaky and get away with something because they know you are not smart enough to catch them. And by the way, did you know that bears like me can smell food from over 20 miles away? You should try showering sometime.