1. more than one Ford Focus
2. a multitude of Ford Focus'
3. used as plural for Focus
Check out the Foci racing.
That's a shitload of Foci.
Maybe we can get together and detail our Foci.
by TrickFocus June 27, 2006
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To focus. Not slack off, to be on point.
Bro you need to foci up! We gotta get this money !
by Tripzeek November 27, 2017
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Short for {focus}, usually weed, but it can be a term for whatever gets you high. Also, it can be a synonym for being high.
Yo man you got that foci? Yeah man I got you.

Man I smoked a blunt of dank. Now I'm foci as hell.
by chizzle222@yahoo.com March 24, 2010
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Stands for "fall off chair in shock", related to lol and pmpl.
Random: Damen isnt gay!
KraiZ: Focis!
Random: Oh my bad, wrong person. Pfft... Damen's a bitch.
by KraiZ December 16, 2004
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Word used in place of "fuck" to prevent bad language.
Why don't you go fuck your man you stupid foci.
by John Jones January 30, 2003
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¡¿What the foci?! is an expression that is relatively unknown and unused, considering that each year millions of high school students worldwide experience a great need for such a phrase. This phrase is simultaneously a profane question and exclamation, and so a fukquestatement. Within the realm of high school mathematics, a "focus" is a point within the interior of an "ellipse" (a circle that stayed out too late the night before, i.e. ellipsicated). An ellipse is one of the conic sections aka connexations sic. In fact, there are two such points, and the plural is foci (as in octupus / octupi). Students are often asked to find the foci of an ellipse in a homework problem or on a test. Typically, this situation arises in the spring of the school year for students in Algebra 2.
Some students had no problem figuring out the details of conic sections during the exam. However, the twins, who had instead been pondering the associated study of connexations earlier that spring instead, did have a problem. After being asked to describe the two most important points within the interior of an ellipse, bewildered and frustrated, the twins simply felt ellipsicated, looked at each other across the room and nodded in silent agreement, ¡¿What the foci?!
by nothinc April 7, 2019
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