What does FIL mean?

Father-in-law

FIL

Other definitions of FIL:

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How to use the term
FIL:

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More slang terms:

LSS

LSS

Long story short

NNTST

NNTST

no need to say thanks

Succubus

A slang term for a seductive or alluring female demon that is said to have sexual intercourse with men in their sleep, haunting their dreams. Female form of the incubus.