Friends

Teenage tourist girl to friend: Wanna play connect the dots with my track marks?
Friend: (laughs nervously)
Teenage tourist girl: Also, if you do that stupid thing with your water glass again, I'm gonna strangle you, and throw you in a pit and put a dead dog on top of your grave. Pass me that cheese?

Pizzeria
Rome
Italy

Guy: Are they gay?
Friend: Yes, they're holding hands and wearing the same clothing.
(15 seconds later)
Guy: Are they gay?
Girl: That's a family.

Hillcrest, California

Woman, waiting for Two Gentlemen of Verona to begin: This is one of Shakespeare's comedies, right?
Friend: Yes.
Woman: Someone will cross-dress, there will be mistaken identity, and love triangles, and everything will turn out well. All Shakespeare comedies have the same plot.
Friend: Yeah, pretty much.
Woman: They're all just episodes of Three's Company.

Boulder, Colorado

Man to friend, very seriously: Now, when you shower, do you stand up?

http://www.overheardinminneapolis.com/2007/08/i_dont_know_have_i_been_drinki.html

Overheard by: I prefer the fetal position

Little old lady, yelling to friend across the store: The world is flooded with Beanie Babies!

Wauwatosa, Wisconsin

Overheard by: Embarassed at how loud my friend laughed before walking away

20-something chick, gravely: I'm having severe intrusive thoughts about buying a medium popcorn.
Friend: So go buy a popcorn.
20-something chick, gravely: No, you don't get it. I'm serious.

Vancouver
Canadia

Girl, as friend shows apparently horrible picture of new driver's license: Oh, honey, it's okay! As my sister always says, everyone has their Puerto Rican orphan moment, one time or another…

Arabian Restaurant
São Paulo
Brazil

Overheard by: henrietta

Economics graduate to friend, looking around sadly at subdued crowd: We should go to the poli sci graduation later. I heard it's riotous.

UCLA
Los Angeles, California

Overheard by: Another Economics Graduate

20-something girl to friend: You should totally eat some meat. Maybe you'll get the meat sweats.

Wedding
Redlands, California

Overheard by: Ruben

Translucently pale white girl staring at cop car, to equally pale friend: My god, we've turned into black people!

Aurora, Colorado

Overheard by: Lee