repeat after me, bunnies:

here's a recent addition to my sydney dictionary. i heard these already on monday, but forgot to write them down:

saliva siblings (also spit sisters/brothers)

1. when you snog someone that your friend has snogged already, you and your friend become saliva siblings.
   
   - "oh chris, guess what? we're spit brothers!"
   - "oh no, who did you do now?"