Computers
What's the first sign that your computer is getting old?
It starts to have memory problems.
Eggs
When is an egg just like a losing team?
When it is being beaten.
Trees
What do fir trees do when they are sad?
They pine a lot.
Martians
Why are Martians green?
They forgot to take their travel sickness tablets before leaving Mars.
Business
Knock, knock.
Who's there?
It's Nana.
It's Nana who?
It's Nana your business.
Doctors
George: 'Do you know what Dr Williams's specializes in?'
Tom: Yeah, he diagnoses wallets.'
Computers
Your program is sick! Shoot it and put it out of its memory.
Crime
The murderer definitely displayed ruthlessness when he committed the crime!
How do you know that?
Because Ruth was with me.
Human
To err is human, to moo bovine.