This means that the person has exactly three people watching you, not including themself. This is was originally by FBI, Secret Service, and Marines. But has recently been adapted to Thug slang. In the case of Thug slang, it means that the person has back up...
"Ya'll hear about The 3s?"

"Watch out for The 3s."
by Bryan3s October 25, 2005
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The acronym for Thrid Strike also known as Street Fighter 3: Third Strike
Hey! How's your 3S skills?
by Barron June 29, 2004
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1) Shit
2) Shower
3) Shave

The 3S rule. Manly.
Awww man, I'm dying after rugby, gonna have a 3S and head out for a few jars!
by VernDogg December 1, 2007
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The shortened version of "skeet skeet skeet". Made famous by Lil Jon & the Eastside Boys.
Mike: Hey G what's poppin'?
Tom: n2m, u?
Mike: Workin'
Tom: Aww 3S!
by fsck November 28, 2007
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u need ta stop brinin beef to everyone because one day ur gonna get clap down and it aint gonna be pretty
by ??????????****?????????? November 7, 2003
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loosely fitting clothing appropriate for sleeping; typically pajamas. Tier 3s are preceeded by tier 2s and tier 1s - lounging attire and dress clothes respectively.
I am so fucking tired of this dinnner party; I can't wait to get home and chill in my tier 3s.

She was so hungover she didn't get out of her tier 3s for two days.

I answered the door in my tier 3s and told that sales guy to fuck off.
by Carlos13254 December 30, 2016
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3S lady, on the words, that's say it become old age and didnot get married yet.

The actually meaning : Single, Seventies, and Stuck.

Especially in big city , more and more girls join in the line of 3S Lady. they earn more money .but no time to consider their own feelings and love, and no time to seek their boy friends.

So , the words "3S Lady " is very popular in China.
She finally decide to be a 3s lady.
by WildInkHeart December 6, 2009
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