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:
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."
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Bro: "What's the full form of STC?"
Bro2: "Oh its Slovakian Traffic Cone."
by ThatUnknownDude October 12, 2023
Get the STCmug. "STC baseem, u are a wet don."
by BallFondlers59995 May 29, 2022
Get the STCmug. 
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.”
“Yeah and if Dean dies again I stc I’m going to cry.”
by satanhasfeelingtoo April 18, 2019
Get the STCmug. 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.
by mr. Bruthdr July 23, 2019
Get the STCmug. 
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"
Cow 2: "STC"
Cow 1: "Lol, that sheep is hairy"
Cow 2: "STC"
by Cows Are Great May 21, 2012
Get the STCmug.