To back off, to go away, to beat it, to piss off.
Inherited from Ottoman Turkish دفع اول (defʿ ol), from Arabic دَفْع (dafʕ), equivalent to def (“an act of pushing away, repelling, expelling”) + ol (“2nd P. Sg. positive imperative of olmak (“to be, to become”)”).
Practica hablar y memorizar " defol " y muchas otras palabras y oraciones en turco .