Green’s Dictionary of Slang

(orig. US) abbr. of that is all.

1972		D. Jenkins Semi-Tough 21: Commissioner Cameron seems O.K. is all.
1996		J. Cameron It Was An Accident 84: ‘What did I hear outside?’ ‘Dunno Jimmy, what did you hear outside?’ ‘Only my motor getting shot up is all.’.
2001		N. Barlay Hooky Gear 12: The driver he’s makin a livin is all.