The scale anyone uses to rate how beautiful or sexually attractivegirls are, on mostly a personal level of course ;D
Friend: Hey man have you seen that chick in psychology class? She's hot you should ask her out.
You: Yeah She's not too bad, Although I'll give her an 8 on 1-10 Female attractive scale since she's kinda cute though.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).