Dodgy, shifty, suspect. Or as a verb: to lurk in a public place ie a bar or club.
Man, that dude at the bar looks really sifty.
Check out that dude sifting in the corner.
by Gibbonsausage May 16, 2004
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A very dodgy person indeed. The kind of person who lurks in backgrounds, dodgy eyes, the works...
by MattyP April 18, 2005
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When you have a fear of chalk or cannot touch anything with a "chalky" feel like teachers chalk, sidewalk chalk, blackboards, chalkboard erasers or even books that seem to have a "chalky" residue on them. Also, when you cut your finger nails and you cannot touch anything for a certain period of time because your fingers are too sensitive so to say. You may feel "sifty" or have "siftiness" if:
1. you cringe when you touch chalk or chalkboards
2. you cannot touch anything for a certyain period of time after cutting your nails
3. have a larger reaction than most other people when the chalk or chalkboard squeaks
4. if while you were reading this you cringed at anytime

Disclaimer: If you have "siftiness" or ever feel "sifty" please join our cause and ask for a small dry eraseboard from your teacher when you are asked to write on the board so that you do not cause a "sifty" reaction to chalk.
He wrote on the chalkboard with chalk and immediately felt sifty.
by JAN JAN THE DANCING MAN February 8, 2008
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Originating in Wanganui Collegiate School, the alternate slang meaning of sifty is: easy, doesn't take much effort to do, or relaxed
That test was pretty sifty..

I've had a pretty sifty day today
by Alyse-L November 30, 2007
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Casual, gentle pace.

Used by NZ mountain bikers to describe the pace of a ride that is not aggressive or fast.
Any Tauranga riders into sifty night rides?

C. will be taking a sifty women's pre-ride of the Mt. Vic course this Sunday afternoon.
by ClemNobody November 26, 2008
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A male who moaps aruond drunk unsuspecting woman, prying them with alcohol in exchange for sex. This species is an understudy of Sifty Senior, and thus does not have the full array of sifting tactics and approaches as his elder mentor at this time, but will develop these over time.
"Check it out, Sifty Junior is sifting around those Desi girls. He isn't doing the Deluxe Sifty Senior Speical though"
by Siftster September 6, 2006
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A mentor to Sifty Junior. This species will sift on such internet sites as MySpace, Friendster, Match.com and various other internet sites under various aliases collating an extensive collection of potential female conquests. This species also prowls around bars for drunk and unsuspecting victims to vigourously grind down on the dancefloor.
"Yo Sifty Senior is at it again, he's got his head down, intense look on his face grinding the hell of that slut on the dancefloor. Hope he doesn't leave his phone and jacket at the bar tonight!"
by Siftster September 6, 2006
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