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3.
ILS
I.L.S. or Imaginary Lat Syndrome is an ailment suffered by men who walk around with thier arms further away from their lats (latimus dorsi), the muscle on the side of thier torso, to create the illusion that their lats (and physiques) are much bigger than they are.
Did you see Leah's new boyfried? The kid's got I.L.S. He think he's big but he's only like a buck fifty.
by People Skills May 18, 2004
 
1.
ILS
Acronym for Inflated Lat Syndrome. ILS is a primal threat/mating display observed in the human male. The ILS display involves the male human holding out it’s arms away from it’s body at approximately a 20-40 degree angle and then walking with a slow deliberate gait inorder to look more imposing to other humans. The posture is used primarily as a form of non-verbal communication such as a mating display to attract or impress females or as a defense or dominance posture to appear larger to a threat or to intimidate rival males.

ILS displays can be observed :
In the gym after an insecure male works out for 3-5 minutes.
On the beach when a single male approaches a group of females.
When a male enters a bar or dance club.
When a male is too scared to throw the first punch in a fight.
On the outside of mosh pits by the bouncer who’s had enough of sweaty punks bumping in to him.
Dude. Check the wigger with ILS and a bad attitude coming through the door, he must think he’s the shit or something. Lets kick his ass later.
by Trav October 27, 2004
 
2.
ILS
Invisible Lat Syndrome. Guys who walk around thinking they're the man. Their arms are spread so far out that you cannot see their latissimus dorsi.
Look at this fool walking into gym class. He is only 15 inches wide but somehow he cannot fit through the doorway. Don't touch him, you might get ILS.
by jesusofmobile April 19, 2008
 
4.
ILS
Invisible Lat Syndrome.
Usually ILS sufferers are guys that refuse to work out, but nonetheless hold their arms out at about a 45 degree angle from their body as if to say "hey it's hard bein' this ripped" Also called "the cobra" Often times coupled with the very popular IGS or Invisible Girdle Syndrome.
by clockstopper September 26, 2006
 
5.
ILS
Instrument Landing System

It is used in aviation, typically on bad IFR days. I HATE using the ILS because there's no skill...

Some operators require a landing with ILS, and some European airports do too.

I prefer doing NPAs or RNAV approaches...

The ILS catches usually around the Mode C Veil - 30 to 50 NM from the airport.

Usually only Class B Airports have ILS systems, but some Class C airports have Cat I systems...
Me: Hopkins Tower, this is Delta 4558 inbound, full stop, ILS landing...uhh Delta 4558

Them: Roger, standby Delta 4558

Me: Roger, Standby
(5 mins later)

Them: Delta 4558, cleared to land 24R, you are number two. Winds 250 at 10, altimeter 3021.
by FO Jim May 13, 2012
 
6.
ILS
The acronym for "Infinite Loading Screen"
usually used by computer-whiz's and game geeks who don't want to

waste their time saying out that whole business..
Can also be used as a verb.
(ex: I got ILS'd)
"So how did the mods work for you?"
"Shitty. I started up my old save, and then I just got ILS'd"

"Damn, that sucks..."
by Penxiel August 16, 2014
 
7.
ILS
Short for "Instrument Landing System"

A system used by airports/commercial aircraft for facilitated landing; specially useful in low visibility conditions.
"Peason Int. airport is equipped with category III ILS"
by Xerxar February 07, 2012