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1.
LIS
LIS simply stands for laughing in Silence. For all of you who have the addicting thing called myspace, use LIS instead of LOL.
Dude 1: That was fun shooting that video w/ AZN and Long Hair Man.

Dude 2: LIS, screw LOL
by Kirk Kaubish March 11, 2006
 
2.
Lis
An insanely beautiful person, both inside and out.

She carries herself well and deals with problems positively.
Always in a good mood and happy with a huge grin on her face. She makes friends easily and falls very hard when it comes to love and relationships. She's usually getting hurt when it comes to dating, but in the future, that one special man is waiting to come into her life. Lis is simply amazing.
Person 1: You're so sweet!
Person 2: Yeah, my name's Lis, lol :)
by duuuuuuuuude:D November 14, 2011
 
3.
Lis
Noun. 1) In a global set consisting of a multitude of binary experiments, each with only two outcomes; pass or fail, Lis refers to a rate of success of no less than 8 standard deviations above the mean.

A favorable statistical anomaly

Adj. 2) A shockingly overwhelming appeal to the bodily sense of taste or smell, usually associated with an incredibly rare and exquisite gastronomic event.

Verb. 3) To observe something so perfectly beautiful that life in general, even in its most revered and sacred moments, becomes pale and dull by comparison.
1) “Have the new quality control process implementations at the nuclear facility proved to be as advantageous as envisioned?”
“Absolutely, the probability of not having a core meltdown has increased to greater than (1 - Lis).”

2)“The laboratory replication of the late Auguste Escoffier’s signature dish was so decadent to the senses, the experience was approaching Lis.”

3)“today I Lis, Tomorrow I die.”
by TeamRedBalloons March 10, 2011
 
4.
lis
an abbreviation for: "laugh inside silently" is intended to be used for instant messaging, an alternative to the abbrev. "lol". Due to the fact that no actual laughing occurs when one types "lol" to another, this term, "lis", enables the receiver of the message to understand the sender's true level of humor
Ted: Dude, i'm pulling an all-nighter to finish this essay, damn procrastination.

Dave: lis...

Ted: Not that funny huh?

Dave: Naw man, it's funny, just not "lol" funny
by shre123 March 09, 2009
 
5.
LIS
short for Laugh In Silence.
Why do we all put laugh out loud LOL when what we atually do is laugh in silence (LIS). You're funny, LIS.
by ThatBPolly February 15, 2009
 
6.
LIS
Initialism for "like I said."
LIS, I don't think Hitler was that bad a guy.
by nawbodeh February 05, 2012
 
7.
lis
Laughing in silently.

If you are laughing but not out loud, dont type lol when you should be typig lis.

Its worse when you are on webcam and see the other person not laughing out loud and yet typing lol.
Example

webcammer1: lol
webcammer2 : But I dont see you laughing out loud, why are you saying lol?
webcammer1: Oh sorry, I meant ..
webcammer1: lis!
webcammer2: good girl
by moedefoe April 30, 2009