STI
A sexually transmitted infection.
Hey John I spent hours last night googling STI to get some relief, I cant take this itching anymore.

Its it Ironic how the owners of stirelief.com cant get rid of their site.
by eldudebrothers May 31, 2011

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An abbreviation for "successful troll is successful."
Jim: Yo, Korea! Starcraft sucks!
Korea: RRRRRRRRRRRRRRRRAGE!
Jim: STIS!
by Ban-Ki Moon November 05, 2010

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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STI
Stevenage Transmitted Infection - like a sexually transmitted infection but the origination of the infection is from Stevenage, most likely the leisure park.
My mate from work caught an STI after chomping into a girl on the leisure park
by Bestos001 September 29, 2011

The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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sti
Sexually Transmitted Infection/Illness

Another way to say STD (Sexually Transmitted Disease)

Is usually tranmitted through vaginal sex, oral sex, and anal sex, but can be transmitted through breast milk, blood transfuisions, and shared drug needles, among other things.
STIs are so much fun! ...Not! Chlamydia, an clap silteach(Gonorrhea), Syphillis, breac bhoiceannach (Herpes), lionnachadh-grùthain (Hepatitis), an galar seirge (HIV), is that really worth sex without a condom? Throw you life away with one little fling?
by Lorelili March 19, 2005

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

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sti
Sexually Transmitted Infection
I got an sti after gangbanging all those dirty ass ho's.
by veeco January 01, 2004

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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STI
Scandalous Type Individual/s

1) She hella mean and if your bootsy she'll tell you , she a STI
2)They stay geesin , no wonder they some STIs'
by Bossy-1 July 27, 2006

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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sti
Pronunciation: "stee" not "ess-tee-aii".
Swear word in Québec.
Abbreviation of wordESTIword or wordOSTIword or wordASTIword
"Le film à voir avec ta tête sti".
"Sti d'imbécile".
by StéphaNapkiN July 24, 2003

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt