FMIL

Fucking Mother-In-Law.

For when your vitrolic loathing needs to spill forth, but in a tastefully discreet acronym.

"Dude, she's such a bitch, I think she's ready to become the FMIL."

by sheertone March 24, 2006

FMIL

Future Mother-In-Law.

The non-dirty (and probably more oft-intended) version of FMIL.

"I hate getting emails from my FMIL."

by invisibelle December 10, 2008

FMIL

Fuck my imaginary life.

Lochlan: Dude, even the imaginary version of Jane hates me!

Matt: Wow.. FMIL.

by Kookoo Hatterland August 08, 2010