Here are some randomly selected joke topics beginning with the letter 'U'
Unable
What has a big mouth, but is unable to talk?
A glass jar.
Umbrellas
What is most useful when it is used up?
An umbrella.
UFO
What do you get if you cross a baby with a ufo?
An unidentified crying object.
Umpire
What does a baseball player do when his eyesight starts going bad?
He gets a job as an umpire.
Ugly
MABEL: When I'm old and ugly, will you
still love me?
PERCY: I do, don't I?
Umbrella
When does a mouse need an umbrella?
When it's raining cats and dogs.
Ugly
My last girlfriend was so ugly, that when she worked in a pet store people kept asking
how big she would get ...
Ugly
My physchiatrist told me I'm going crazy. I told him "If you don't mind I'd like a second opion. "He said "Alright .. you're ugly too."
Umpire
When is an baseball umpire like a telephone operator?
When he makes a call.