Low life, right one, very loud air force female (4-4)
I believe the answer is:
riff-raff
'low life' is the definition.
'right one very loud air force female' is the wordplay.
'right' becomes 'r' (common abbreviation).
'one' becomes 'i' (roman numeral).
'very loud' becomes 'ff' (musical abbreviation).
'air force' becomes 'raf' (Royal Air Force).
'female' becomes 'f' (abbreviation).
'r'+'i'+'ff'+'raf'+'f'='RIFF-RAFF'
(Other definitions for riff-raff that I've seen before include "Hoi polloi" , "Rabble" , "Dregs of society" , "rubbish" , "Undesirables" .)