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30.
Acronym: "Beast I'd Like (to) Fuck"

A beast, whether tame, wild or mythical, that a human individual sees as attractive enough to want to have sexual intercourse with them. Just because they're non-human doesn't mean that they don't need a spark in their love life.
That ewe on her own in the corner is a right BILF.

Last night was awesome - I met up with a whole load of likeminded individuals and we whiled away hours comparing BILF conquests.

A BILF hunter aids others in their quest for top-notch BILF usually cataloguing possible BILFs on their internet site.
by The one and only BILFhunter June 01, 2006
 
1.
Babysitter
I'd
Like to
Fuck
Damn, is that bilf of yours coming to watch you again. I'd like to have sexual intercourse with her!
by just another cracka July 09, 2003
 
2.
Possibly the most versatile word in any language. Though it sounds like "some b word I'd like to fuck," bilf actually refers to semen, but can be used much like fuck in that while someone can be bilfing, can bilf all over the place, can be full of bilf, and can be bilfed upon or into, they can also be referred to as a Bilf.
Damn hot mama, I'm gonna bilf in your bilf chalice.

Steve: So he stole all your shit?
Joe: Yeah.
Steve: What a bilf

You bilf nugget

you bilfing moron.

I'm gonna fill you with so much bilf you're going to get swimmers ear.
by esoterism October 28, 2009
 
3.
Baby I'd Like to Fuck
In the tv-show Family Guy the baby Stewie sees a beatiful baby girl and says: " O wait wait bilf, total bilf" .
by Respecta January 17, 2011
 
4.
A Family Guy joke made by Stewie. A play on the phrase MILF. Stands for Baby I'd Like to Fuck
Stewie: OMG what a BILF
by Mardy M January 16, 2011
 
5.
"baby I'd like to f*ck" as said by Stewie on family guy....it's only cool for him to say it...if you say it then you're just a pedo
Stewie: Oooh ooh bilf! She's a total bilf!
by squishy-tishy January 16, 2011
 
6.
Beard I'd Like to Fondle
Lea ~ "Holy shitkebabs; see that beautiful bloke over there with a massive beard?"

Victoria ~ "Yeah, what a BILF, let's go fondle it!"
by BILFuk February 05, 2014
 
7.
Baby I'd like to Fuck

Made famous by Stewie Griffin on Family Guy
Oh BILF, check out that BILF
by FG Fan January 16, 2011