I've got nothing better to do's definitions

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

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