Here are some randomly selected joke topics beginning with the letter 'Y'
Yesterday
"It's gone forever - gone forever I tell you."
"What has?"
"Yesterday."
Yesterday
Fred: Did you meet your wife at the airport yesterday?
Joe: No, I met her at a dance about ten years ago.
Yorkshire pudding
Knock, knock.
Who's there?
Ross.
Ross who?
Ross beef and Yorkshire pudding.
Yawn
Keep talking. I always yawn when I'm really interested.
Yodel
Knock knock
Who's there?
Little old lady
Little old lady who?
Gee, I didn't know you knew how to yodel.
Yawning
Of course I'm listening to you don't you see me yawning?
Yesterday
If yesterday was today - today would be yesterday.
Yodel
Knock knock
Who's there?
Little old lady
Little old lady who?
Gee, I didn't know you knew how to yodel.