8
In Asian dramas this is Seconf Lead Syndrome. There are the two main leads that are destined to be together but you always have some poor, handsome secondlead whofalls for the main lead. While they may be winning with the main lead for a while, they almost always lose in the end. SLS applies to the either female or male second lead, but usually more sympathy is felt for a male secondlead. A lot of female second leads come off bitchy and cunning.
Friend: *crying* '"noooo, this can't be"
Friend#2: "What"
Friend: "My ship is destined to sink and never become cannon, why did I fall for the second lead"
Friend#2: "I think you have come down with a classic case of SLS"
Friend: "Not second lead syndome, nooooooo"
by Princess Pandamonium September 19, 2016
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9
A sls is a second life slut, this comes from the online game second life.

A secondlife slut tends to be over wieght, ugly and usaly over the age of 40 in real life.

Her second life avatar is slim, blonde, huge sexual features and tends to ware no clothing and have bought sexual gestures.
Boy: Damms shes sexy
Boy 2:shes proably an sls
by Korrie barker February 13, 2009
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10
An Acronym meaning
Sudden Leaving Syndrome.

Sufferers tend to have the attention span of a fish and leave conversations or internet chat. When not given attention or a discussion is not about oneself

But you can only apply SLS to a sufferer when the given person leaves unannounced or a very quick "bye" giving no time to initiate their departure.
Dave: "so.. Emily how's life?"
Emily: "Great at the moment, bit bored with scho..."

-During Emily's reply she quickly Turns around and leaves completely unannounced and unepected during conversation.

Another Example of SLS can be seen in Instant messengers
for example

*Emily Logs on to internet chat*
11:15AM Dave Says: "Hi Emily"
11:16AM Emily Says: "Hi Dave"
11:17AM Dave Says: "Hey what you doing tonight?"
11:20AM Emily Says: "not much mum wont let me goto this party so i think I'll sneak out"
11:20AM Emily Says: "BYE xo"
11:20AM - Emily appears offline -
by David22212122 April 04, 2008
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11
Short legged syndrome. A condition where the legs are disproportionately short compared to the torso. This is not dwarfism, but rather a physical trait confined to the legs. SLS is a cause of women not becoming models and men being insecure. Cases of SLS are prominant in certain geographical areas and rare in others.
It's a good thing your girlfriend wore her 4" heels. Otherwise her SLS would have stood out.
by Megatron1969 November 16, 2009
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12
Abbreviation for "So like Sup?"

Which then means "So like what is up?"
Alex: sls pal?

Dilan: just chilling. sls with you?

Alex: Same.
by jayzzzzzz May 20, 2009
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13
That dude is totally a SLS. Yeah, he doesn't even bother to learn to do that shit properly...
by joqqeman February 29, 2016
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14
SLS is "Smiling like Shit" SLS in emoji 😁 💩 in a text received from a chick from the DMV area.

Example:
M: swear I love you girl...
H: sls.
You: You know I love it when you do that...💦
Her: Sls.
by MazaratiSlim September 26, 2014
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