An expression with strong sexual connotations, it is used generally when referring to someone of the opposite sex who, while not attractive enough for the subject to actively pursue as a sexual partner, is sufficiently attractive that if said person were to pursue the subject for the same reason, the subject "wouldn't say no".
"Your one over there, she hasn't the best face on her, but I wouldn't say no."
1. Used when looking people up, means wouldn't go up to them but if they came up to you, you wouldn't reject them.
2. If they asked for sex, you so would.
Person 1: Babe at ten man!
Person 2: She's alright, I wouldn't say no!
This is a great phrase and you can use it a lot of ways.
A) As a reply to a stupid comment
B) As a reply to a comment you didn't listen to/didn't really care about anyways
C) As a reply to something stated that you would not even consider
a)Alex: Like OMG OMG!!! willam hung is like so cute and like i think hes gonna like ask me out OMG!... Jorden: WOW no.
b)Alex: guess who made a 100 on their test?!?!? MEEE!!!... Jorden: WOW no.
c)Alex: would you like to schedule a mammogram im not a doctor! Jorden: WOW no.