FIL

Its Father In Law ... Simple typo replacement is FIL

My FIl is the best Father in law in this world ... :)

by Viz22 June 27, 2016

FIL

acronym for FUCKING IDIOT LIAR. A person who openly makes up stories and lies to you, but is ridiculously idiotic and so doesn't understand your superior intellect knows he is lying to you.

FIL - yeah bro, I want to discover black matter, I'm way into physics.

smart guy - I think you mean 'dark matter'

FIL - yeah, thats what I'm talking about, black matter. Dude I got my masters in Physics, I'm brilliant!

smart guy- wow, I think I need to go.

by bigbinthehizzy July 30, 2009

FIL

abbreviation of Father-in-law; often used in internet conversation

My FIL is flying down to see my husband and me this weekend.

by TweedyChic March 28, 2005

FIL

fall or falling in love

uh oh, I think I'm FIL.

I am FIL.

FIL

by sir. awesome October 28, 2011

FIL

An abbreviation for Fool In love

OMG! Beth, I saw Jack at the pumping gas at the gas station yesterday. He didn't realize it was me so i beeped. He waved, paused a second, and then he had this really big shit eating grin on his face only a FIL would have.

by GHFdaja87 February 26, 2006

FIL

Some unit strich9ine doesn't know

who the fuck is FIL ?

by S9 March 6, 2003

fil

Fake Internet Lesbian. An adult entertainer that only performs with women when in front of a camera.

She is just a fil; she is actually married to a man.

by spacedoc October 20, 2006