There's a whole series of UU jokes (as with any group)
One of my favorites is: Why are UU's such terrible hymn singers? They're always reading ahead in the song to see if they agree with the lyrics.
Others that I've come up (with a format shamelessly borowed from a wonderful comedian)
You may be a UU if:
Your idea of a "Men's Night Out" is attending a N.O.W. rally.
Your idea of fish on friday is sushi.
You and your cat share the same therapist.
You watch Jaws and root for the shark.
Your Christmas tree is topped with a menorah.
You ligt a chalice prior to brushing your teeth in the morning.
Your Holy Trinity is Peter, Paul & Mary.
Your signifcant theological mentors include Snoopy and Pogo.
etc, etc, etc, etc . . . . .