Why do fluorescent lights hum?

Because they don't know the words.

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Know Jokes More Know Jokes

How many Toronto Maple Leaf fans does it take to screw in a lightbulb?

Nobody knows. They always say they'll do it next year.

How many librarians does it take to screw in a light bulb?

I don't know but I can look it up for you.

Word Jokes More Word Jokes

What's the plural form of the word "anecdote"?

Data

What do they say about a rapper who stole a dictionary?

He got a way with words.

Hum Jokes More Hum Jokes

Why do bees hum?

Because they can't remember the lyrics

Why do guitar amps hum?

Because they don't know the words.