This is a major insult only used when one has run out of the normal insults and needs something that will incompass all of the other insults into one big one. One can spice things up by substituting other words at the end such as, joke in a hobo's sock, joke in a rabbits ear, joke in a
paper bag or even joke in a goats
butt crack..ext.
Me- Alvin can i borrow your car tomorrow bro?
Alvin- No man i need it to take my
girlfriend to a play.
Me- Your a "Joke in a hat" you dork.
I asked billy bob to come to my ex
girlfriends birthday party and that "joke in a sock" said he had to study.