Top Definition
A woman who has big breasts and no ass. A woman who is large at the top and small at the bottom.
"You have 36DDs and you wear a size 4 with no ass. You are an improper fraction"
by TUNE15 September 12, 2006
2 more definitions
A couple where the woman is larger than the man, either in height or weight.
Dave: Do you see that couple over there? She's enormous and he's thin as a rail.
Bob: Yeah, I always feel bad for guys in an improper fraction.
by maf54 May 05, 2010
a person whose chest is much larger than their abdomen (from a term for a fraction where the numerator is greater than the denominator)
Only after her plastic surgery did she realize that she had become an improper fraction.
by The Return of Light Joker September 13, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.