MSG

I went to see my first sporting event since my arrival to US - Knicks vs Pistons in Madison Square Garden. You can tell that the home team is not doing great when the loudest cheers are given to the guys shooting T-shirts to the crowd during breaks. I think I've got to get one of those - I mean one of those cannons that shoot T-shirts.

Wedgie

As defined in Wiktionary: Noun, 1. (slang) A prank in which a person's underpants are pulled up sharply from behind in order to wedge the clothing uncomfortably between the person's buttocks

This belong to the category of expressions that I didn't really need to learn - and yet I wish I could start the elementary school all over again and launch this noble activity in Finland.