Being on ones-own. Shorter form of playground jibe 'Billy Bates, got no mates'. Referring to some imaginary character 'Billy Bates', who is too sad to have any friends.
Can refer to ones-self as 'being on my bates'. In other regions is just referred to as being 'Billy No Mates'
Example2: I'll order a pizza tonight, I'm on my bates.
person B-dood, i love to bate it's so sweet.
Tom: Ah! That's bate on me!
So I met this stripper after she got off and drove her home last night.
Friend 2: You mean you pulled a Bates