Short form/abbreviation of the term "Slovakian Traffic Cone". Check it out on your own risk. STC may also stand for other terms such as "Stop The Car" or "subject to contract" etc...

Example:
Reddit meme: "I told you peter to not search for STC"
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Bro: "What's the full form of STC?"
Bro2: "Oh its Slovakian Traffic Cone."
by ThatUnknownDude October 12, 2023
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A term used by ‘Supernatural’ fans meaning ‘Swear to Chuck’. Meaning the same as the phrase ‘Swear to God’.
“Hey did you see the latest Supernatural episode?”

“Yeah and if Dean dies again I stc I’m going to cry.”
by satanhasfeelingtoo April 19, 2019
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STC, also known as 'sexually transmitted cockroach'. This practice entails consuming a cockroach and letting the cockroach travel through your body towards your penis. Once in the penis, you MUST have sex. The cockroach will exit via the urethra and enter the vagina of the girl. Hence, an STC is transmitted to the girl.
She had to go to a gynaecologist to remove an STC.
by mr. Bruthdr July 23, 2019
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Short for 'Said the cow'
Cow 1: "Mooo mooo moooooooooo moo moooooo"
Cow 2: "STC"

Cow 1: "Lol, that sheep is hairy"
Cow 2: "STC"
by Cows Are Great February 28, 2012
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The new acronym for the politically correct term, "sexually transmitted condition." It is the new way to say sexually transmitted disease (STD), but is considered to be more acceptable since it does not make the people suffering from them sound quite as unclean. Unfortunately this term now also includes pregnancy which could pose to be a social problem for anybody who is actually having a legitimate pregnancy.
Crabs, gonorreah, AIDS, and now even pregnancy are forms of STC.

Even though she planned out her pregnancy, Jane is still talked about around the office for having an STC. What a bimbo.
by Big G and Suba October 19, 2006
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Her: What are you up to
Him: Just stc
by Chicken man 174.5 July 18, 2017
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