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It's and acronym for Security Commission. It's the ultimate police of discord. They are so deadly that if a guy who knows a guy that then said something to an unrelated guy that was bad about SECO that they find out about this.
Guy 1 "SECO is gonna beat my ass because I know a guy who knew a guy."
SECO by Epic989 March 3, 2019
Words you can keep
Graffiti Mongul located in suburbia mid new york Newburgh and Poughkeepsie. Mostly known for his tough freestyle flows and impulse bombing. Keeping the region on lock. Most Cant Compete. Nyg HD Mgc
Girl1: have you seen Seco Dun Dodda new shit i heard hes hot?

Girl2: Yeah...id hit it.
Seco by Gx450 June 11, 2011
A discriptive word of someone who is poggers champion.
Yo, that male over there is cool, you could call him seco
Seco by secoispoggers March 9, 2021
Girl1: How was last night with your lover boy?

Girl2:Ugh!! He was so seco!

Girl1:Damn, that sucks, don't expect to have any kids!
Seco by LitaCub March 30, 2009
Sexo con ropa ,haciendo cosas malas con ropa
El maldito le gusta hacer el seco
Seco by Sseco May 22, 2026
Short for "Seçkin"

Elite gentleman. Always thinks before he talks and will atract every woman in 10 mile radius with his talking skills. Such a Greek God. Makes everything ten times more fun. Also a helpful friend.

Seço's are types of people you want to keep around you.
-Have you seen Seço?
-Yeah, he is over there making everything better!
-I wish I was like him.
Seço by ophoenix July 27, 2022

Seco Bad 

Someone named Seco who is bad
ME : hEY, sECO bAD
Seco: No
Seco Bad by Seco Bad February 5, 2021
More from Urban Dictionary
Acronym, meaning Too Long Didn't Understand
Similar to TLDR
Sister: This meeting was to discuss the rough draft of my essay, where we discussed the subsidiary questions I added in my rough draft. We also discussed the relationship between my main title and the real-life situations I chose to use in my essay. We discussed the structure of my essay as well, specifically the Math AOK section and how it relates to the contradiction of the title. This second meeting was particularly helpful in discussing the implications of my essay claims and how to apply the title across various areas of knowledge. There were many sections of the essay that could have been cut down in wordiness and the ways of knowing required further and more in-depth analysis.

Me: Woah! TLDU!
TLDU by L-Evans January 14, 2019
Word of the Day on August 30, 2026
the act of having anonymous sexual encounters with other men in public toilets.
Cottaging by greeef April 24, 2003
Word of the Day on August 29, 2026
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