Breastie 

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.

Breastie by Lipsmackinggood December 12, 2012

Breastie 

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

Breastie by I've got nothing better to do May 28, 2016

Breastie 

Selfie of a women's breasts.

I'd like to see a breastie of her's.

Breastie by Mrberlinnh September 18, 2014

Breastie 

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! :)

Breastie by Its funny girl! Nyan-ja~ June 20, 2014

Breastie 

A friend that is also a breast cancer survivor

I went to the Flattie’s Ball with my breasties!

Breastie by Lsears July 27, 2020

breastie 

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.

breastie by inappropriate bill December 29, 2010

Breastie 

Close friend possessing large cup breasts.

Andrea is my breastie because she is my good friend with a size triple D bra

Breastie by FF18213 April 23, 2017