Originally Posted by polish_aristocrat

I often use "prolly", I guess that's an abbreviation, quite common on forums etc...

EDIT: http://www.urbandictionary.com/define.php?term=prolly

Shortened version of "probably". Typically used in online conversations, although REALLY lazy people have started using it in verbal conversations as well...

Web-slang abbreviation of "probably". Used extensively in forums and instant messsaging worldwide.