A term used to refer to a corrections officer.
Shithead CO's often turn a blind eye to jailhouse violence.
by Tim April 10, 2005
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Short term in the military for Commanding Officer.
Where can I find a CO?
by Bobby De Niro August 5, 2004
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The Comics & Cartoons board over at 4chan.

Regulars of the board are called /co/mrades.

Often at war with /v/ (Video games) but I don't partake in those.

Better than the shithole they call /b/ will ever be.
/co/ is...um...oh fine, YOU come up with a better example then.
by Gravija May 15, 2008
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An expression used in place of a long sigh.
Co-or, Marjorie said when seeing the stack of dishes in the sink.
by TrishaE September 4, 2019
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Comics and Cartoons board on 4chan. Inhabited by:

* Fanboys of My Little Pony, Adventure Time, The Regular Show, and Homestuck (the en vogue series as of May 2011) whom will flood the board with general threads.

* Adult men who idolize comic book superheroes.

* "Nostalgia goggled" anons who think 80's - early 00's cartoons are some of the best ever simply because they were childhood favorites.

* Trolls who post fetish drawings or laughably terrible deviantart drawings.
Typical /co/ thread

OP: What was the best cartoon ever? I vote for Dexter's Laboratory. (pic is most likely a fetish image of an anime Dexter getting his feet tickled by a foot fetishist)
Anon #1: Ed, Edd n Eddy was the best cartoon ever made!
Anon #2: lol faggot. Pre-movie Spongebob was!
Anon #3: Adventure Time is, no contest.
Anon #4: newfags, Looney Tunes was.
Everyone: >>Anon#4 take off your nostalgia goggles nigger! (irony)
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An abbreviation which stands for the trigonometric function, "cosine." In its native mathematical context, cosine is used in solving for side lengths or angle measurements in right-triangles, exclusively.
In regards to its place within the acronym: SOHCAHTOA, cosine occupies the "CAH," wherein the series forms: Cosine (equals) Adjacent (over) Hypotenuse.
When dealing with an angle measurement, x ("theta"), the side "touching" the angle is referred to as the Adjacent side; the side furthest away from the angle is referred to as the Opposite side; and, in a right triangle, the hypotenuse always remains and, simplistically, may be recognized as the diagonal side.

Note: UrbanDictionary entries do not support Entity, Hex or Decimal browser rendering. This definition of "cos" uses an "x" in place of the Greek small letter, "theta".
However, in reality, theta appears as an "o" or a "zero" with a line going horizontally through the center.
Math Problem: cos(x) = 0.5
Solution: cos(60) = 0.5
by HB <3 SA April 24, 2006
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Your friend texts you some ignorance and you reply " #cos"

Your friend drops food on you pants and you shout "C.O.S.!"
by ilikegrapes May 29, 2010
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