A strong and complex nonsexual relationship between two or more females that is greater than being BFF. Similar to a bromance.
If Jennifer Aniston and Courteney Cox weren't strait I would swear they were lesbians. I guess they are just breasties.
by Lipsmackinggood December 12, 2012

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Top Definition
A best friend of yours that has the same breast size as you
Kim: Hey look, it's my breastie Emma. Let's go say hi!

Mark: Breastie?

Kim: yeah, she's my bestie and has the the same breast size as me.

Mark: let's forget we ever had this conversation

Kim: Agreed

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.

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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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Selfie of a women's breasts.
I'd like to see a breastie of her's.
by Mrberlinnh September 18, 2014

The Urban Dictionary Mug

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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.

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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).

Buy the t-shirt
The accurate term for girls who are best friends.
Jenny: Chelsea, its okay if you want to cancel our plans this weekend so you can to the concert with Lea and Jill instead. I'll understand.

Chelsea: Jenny, are you serious? Pshh, girl fuck them. You're my breastie for life, our plans come first :)

Jenny: Aww, we're total breasties! :)
by Its funny girl! Nyan-ja~ June 20, 2014

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
Super affectionate term used when a straight male has a female best friend: ie a bestie with breasts. More common among men who favor brunch.
Yo dude, you wanna come over on Sunday morning to watch the game? No thanks, my breastie and I wanna put some poached eggs and bloody marys in our mouths.
by inappropriate bill December 29, 2010

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

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