look up any word, like fleek:
 
1.
a ratio comparing the attractiveness of a girl's vagina to that of her asshole, it is not meant to be interpreted mathematically but in more of an expressionistic style
"How was your hookup last night?"
"It was terrible, she totally had a 1:1 contrast ratio."
by Jeufaloop October 23, 2009

Words related to contrast ratio

asshole butt girl pussy vagina