STi

1. Abbreviation for Subaru Technica International, the tuning and motorsports arm of Subaru. Analogous to Mercedes' AMG and Ford's SVT.

2. A model of the Impreza that has been extensively modified by STi. The name STi is used because of the length of the car's real name, the Impreza WRX STi.

3. The poor man's supercar, one which can outrun a Porcshe Boxster in the 1/4 mile and can rip up snow and gravel due to its all wheel drive.

4. EVO killer and the fear of all things Mitsubishi.

"That EVO on the highway got owned by my STi."

by frank carter May 16, 2005

Subaru WRX STi

Better than the Evo in any way. Anyday.

Moron in Mistubishi Lancer Evolution: God damn that Subie looks good. Looks faster than what I have. *sadface*

Smart guy in the Subaru WRX STi: I pity a fool in an Evo.

by SevenStarz December 15, 2012

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 October 30, 2011

STI

STI stands for symptom-targeted intervention, a focused, active, individualized approach that social workers can use to teach patients brief, effective ways to cope with difficult thoughts, feelings and behaviors using evidence-based interventions

Once a patient engages in the STI process, the clinician can help them with a number of specific concerns, from sleep and stress to pain management, relationships and mood management.

by doradee February 11, 2015

Assisted STI

One who helps a friend capture an STI

for example spitting in your mates eye or puking in his pint or jizzing in his kebab. (assisted sti)

by webby7 May 20, 2011

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 May 13, 2005

sti

Sexually Transmitted Infection

I got an sti after gangbanging all those dirty ass ho's.

by veeco January 1, 2004