Web-slang abbreviation of "probably". Used extensively in forums and instant messsaging worldwide.
Red: I'll prolly cream my shorts when they release Halo 2.
Blue: You're such a cockbite.
Originated in a Visual Basic class at Commack High School, it means making something backward.
Josh: How do I backwardize the word?
Dr. B: Backwardize?
Craig: I'm adding that to urbandictionary.com