How exactly do I use FUN Points?

[Zari]

I've been getting FUN points but I don't know exactly where and how to spend them...

[Somnia]

Press F11. You can buy a FUN scratch card there for 100 points, which you can win random items from.

[ResiDenT]

http://bumped.org/psublog/wp-content/uploads/2012/04/Terminal-Scratch.jpg

[Blackheart521]

I've been getting FUN points but I don't know exactly where and how to spend them...

The AC shop tab on your menu, I believe it is 2nd from the right, then 2nd option, then first option allows you to use the FUN scratch. ^^