Comes from 'eeproms' (Electrically Eraseable Programmable Read Only Memory) units in days of yore which were 'flashed' so they could be written on again. Typically, a computer geek would understand this usage.
Technician: "Make sure you flash the drive first, for security reasons."
PC Onwer: "WTF?"
Tech: "Uhh...erase all the information."
Don't belive it?? Create two versions of your website. On your Flash into, but a skip button that takes them to the HTML version. After a couple of months, check which page counter is higher.
#1. Pop-Ups / Pop Unders
#2. Music that plays over and over and etc.
#3 Shockwave or Flash graphics. Content is always beter.
2. Yo, bitch, flash me some titties up in hurr! *stiffy*
3. Oh, Flash, fuck my man-gina harder, faster, oh yeah. *stiffy*
Pimp wingman-"So you pulled a Flash on her?"
Pimp-"You know it."