What does CIF mean in the same sentence as GFE?

GFE stands for "Girl Friend Experience" and is a slang term for the description of a type of prostitute.
CIF stands for C** (slang term for ejaculate) in (on) face.
When CIF is used in the same sentence as GFE, it means a prostitute who will allow, possibly for an addition fee (example: "CIF +$50") or not allow (example "NO CIF") the customer to ejaculate on their face.