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

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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

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Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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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

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt