Here are some randomly selected joke topics
Teachers
Teacher: What is the name given to the small rivers that flow into the river Nile?
William: The Juve-Niles?
Sleeping
Quiet Please - Driver sleeping
Knock Knock
Knock, knock.
Who's there?
Millicent.
Millicent who?
Millicent me over to borrow some money from you.
Idiots
Why did the idiot put on wet trousers?
Because the label said 'wash and wear.'
Pizza
What food did the cannibal order as his take-away?
Pizza with everyone on it.
Sings
What has eight feet and sings?
A quartet.
Basketball
Why did the basketball court get wet?
The players dribbled all over it.
Scottish
What is the name of the unhappy range of mountains in Scotland?
The Grumpians.
Thieves
A gang of thieves broke into a blood bank last night and stole a hundred pints of blood. Police are still hunting for the clots.