Chill Factor
1.How cold someone really is.

2.How desperate for a sweatshirt someone is.
The girl gave away her chill factor in math class:

Girl: ooohh i'm so coldd... Henry do you have a sweatshirt?

Henry (Quaterback): No, sorry.

Brendan (Math Geek): I have a sweatshirt you can borrow!

Girl: oh.. actually, its ok. Its actually kinda hot in here now.