There are three different meanings for the word 'backcase'
- First it could mean a spine in a suitcase, this is the literal meaning
- The intent of 'backing up' a friend in a fight of some sort
or
- When your mate thinks they're hard so they cause a fight and then realise they're only talent is running so they ask their friend to have their 'backcase'
Friend 1 - Oh yeah mate, I'm gonna have a fight with _____
Friend 2 - Alright man I got your backcase
Friend 1 - Thanks mate!