Man Scan 

Usually observed at clubs or bars where a single male body will scope out a potential woman but do a preliminary scan of any threat of a man involved at that time. After the Man Scan, one may either pursuit the woman, back off due to guy, or be a cock block and step in.

I saw some chick seemingly alone, so I did a quick Man Scan and then safely assumed she was without a man.

Man Scan by J0$HU@ October 27, 2007

How Scan 

Greeting used by teens and young men meaning how are you etc.

John:HOW SCAN!!!
Jo:I'm good scan

How Scan by ScAnMan June 4, 2008

ghetto scan 

To take a digital photo of a picture and upload it to your computer; what someone does who doesnt have a scanner.

dude 1: Hey bro, can you scan this photo onto your computer so I can put in MySpace?
dude 2: I dont have a scanner, but i can do a ghetto scan for you! *whips out digital camera*

ghetto scan by ruby 23421 March 16, 2008

U-Scan Swap

A trick used to fool a U-Scan. U-Scans have a weight monitoring system that knows how much an item should weigh when you put it in the bag. You can take advantage of this by scanning one item then putting an item of similar weight in the bag. The main use of this is to scan a cheap item and get an expensive one of similar weight.

Jim: Why did you scan that mountain lightning and put the Mountain Dew in the bag?
Bob: Because I just U-Scan Swapped it mother flowers!

U-Scan Swap by ChadChoosy August 27, 2009

Port scan 

Using software to scan any of the 65536 ports on a computer. This may be done for technical reasons by a network administrator or for nefarious reasons by a computer cracker.

Ned carried out a full Port scan while checking the firewalls integrety.

Port scan by Blue Cawdrey November 19, 2004

RETRO-SCAN 

Exhaustive facial analysis to try to figure out how someone that has just greeted you, but you no longer recognize, used to look a while ago.

I bumped into Kathy Loggins yesterday, and despise a very long retro-scan, couldnt match the 300 pound lady with our former head of cheerleaders..

RETRO-SCAN by El Cuni March 27, 2009

Blinker scan 

The act of trying to find two or more cars with the same blinker speeds at a stop light.

That Ford and that Chevy over there have their blinkers going at the same speed. I caught it on my blinker scan!

Blinker scan by Whipnwhap! December 11, 2009