A word that people (usually girls) use in order to indicate that they are vapid, shallow and most likely unintelligent. It serves as a handy indicator that you shouldn't bother getting to know them because you won't enjoy their company.
It has no literal meaning. Instead it's just tacked on the end of a sentence to make it sound more familiar, similar to 'mate' or 'dude', except completely stupid.
When confronted with someone who uses the word 'babes', be sure to end the conversation quickly because talking to the person in question for too long will probably leave you feeling like you've had a head injury
Me: It's nice to meet you.
Girl: Nice to meet you too, babes!
Me: Hmmm, on second thoughts I don't want to talk to you.