Money

20-something boyfriend with arm around girlfriend: God, we've saved a fortune not buying condoms recently.
Girlfriend: Yeah, a few more years of this and a baby will have paid for itself!

Cork
Ireland

Dad: Okay kids, here's a penny for each of you! Throw it in the fountain and make a wish! Mark*, what did you wish for?
Mark*: A cupcake!
Dad: Okay! Joe*, what did you wish for?
Joe*: A garbage can!

Zoo
Philadelphia, Pennsylvania

Gay guy to hobo: Good morning. Did you get a hair cut?
Hobo: (mutters about spare change)
Gay guy: I know you got a hair cut! See, if you would have said hi to me, maybe I would have given you a dollar or something! (starts walking down street) Why do people have to be so ignorant on such a sunny day?

Philadelphia, Pennsylvania

Overheard by: Meater Maid

European history professor, discussing WWI: And of course, with Germany's resumption of unrestricted submarine warfare, the United States had its reasons to join the war against Germany.
World-weary student: Not to mention all the loans American bankers needed England and France to win to pay back.
Professor: Some of you are too cynical for your own good.

Montevallo, Alabama

Man to another: What's the street value of a giant frog?

Sydney
Australia

Middle-aged woman on cell: Unless he doubles my salary, I'm not sleeping with him.

http://eavesdropdc.blogspot.com/2008/09/sexual-harassment-done-right.html

Overheard by:

Young teenage girl to friend: $3.25 for a Rockstar? That's like, wait… (pauses for a few seconds) That's like five dollars.

Tacoma Mall
Washington

Overheard by: Not impressed by the math skills of today's youth.

Shopper: I don't think I would trust a pregnancy test from a dollar store.
Cashier: Oh, it works. Trust me.

Montgomery, Alabama

Overheard by: not pregnant

Guy #1: My boss, who's a Shaolin monk, told me if I saved his school, he'd pay off my loans. He was like “I pay off 1.5 million dollar debt!” and then, for a while, I was dealing with the Russian mafia, so I've been pretty busy.
Guy #2: Man… Your life is like a movie. It's like Karate Kid 15 or something.

Tulane University
New Orleans, Louisiana

Overheard by: iwouldtotallywatchthatmovie

Barista: That will be $9.74, please.
Customer: I have a coupon.
Barista, singing as she rings up new total: Lies, lies, lies.

Harvard Square
Cambridge, Massachusetts

Overheard by: Trouble