Socially emotionally disturbed
Seriously emotionally disturbed
Yo that dude is SED.
by KY4AP August 23, 2007
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Person 1: Stfu bitch
Person 2: SED you fat cunt
Person 1: Damn...i cant handle that
Person 2: Knowing your slut ass, you will handle it no problem
by AnonymousXIX July 17, 2016
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Ancient Unix tool commonly used for simple string replacements. Abbreviation of "Stream EDitor".

See also: s/
command: echo "test foo blah" | sed -e 's/foo/bar/'
output: test bar blah
by DJMoses May 27, 2009
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The sadest of all sads
"Bro that's so Sed"
"what the actual fuck did you just say?"
by The Redness January 12, 2020
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Substance that induces sedation by reducing irritability or excitement.
Nick: Don't worry, we can use Liam's braces

John: Those would hurt

Nick: Let me grab the shove- ermmm sedatives
by AntiVenom_Hacker February 05, 2012
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It is another word for the word seriously, usually used when someone has done something shockingly stupid or when something stupid that has been said by someone

Much like the word "serio"

usually used by kids from East Los Angeles
1. Seds!!??? you threw up in class???!

2. Seds! you gonna act like that!
by the bad seed June 18, 2009
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A Sed is a person who tries too hard and doesn’t give up easily
Usually used in the video game Hyper Scape
Is used as an alternative to a ‘sweat’
Is a shortened version of ‘sedulous
‘bro, this game sucks there’s too many seds
by AltoKe August 23, 2020
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