Frozen ATPL
Its a British thing. It means you have a CPL and Instrument Rating, as well as all the ATPL theory subjects passed.
When you get the required hours, it 'unfreezes' and becomes a real ATPL.
In Englandland, they can do the ATPL theory exams instead of the CPL theory exams.
Often written on resumes etc as fATPL despite it not actually being a recognised qualification, just shorthand..