Meaning Cockney rhyming slang for arse.
Usage Mainly Britain. Note that the original pronunciation of 'pass' would have been 'parse', to rhyme with 'arse'. This reflects the 'long r' vocalisation of Cockneys. Current pronunciation depends on where you come from
Example
- That was really insulting to my mother. When he bends over he's going to get a good kick up the khyber.
Pronunciation