To revisit the subject of "unfunny" I wish to point out that groups of friends often fail to realize that their own private jokes are not funny to others.
If you and your friends think it's hysterical that you go out and make up outlandish stories about what you do (i.e. "We're the Olympic luge team" or "We move in-ground outdoor pools for a living") good for you. But no one else finds it funny. No one else cares.
Also, don't embarrass the groom at a wedding with an off-color speech based on some private joke of yours. It's inappropriate (remember, there are families at weddings) and it doesn't serve any purpose. It's just not funny.