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.
by SticKboy April 14, 2004
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Obviously a shortened word for 'probably' now used in internet conversations. Before the advent of this usage, it was commonly used in southern U.S. states in particular Texas as common vernacular and does NOT indicate laziness but dialectal and regional verbage.

Using 'prolly' is not a sign of idiocy or laziness but apropos savoir faire, subcultural quirks, accents and mannerisms just like many other phrases that come out of regional places.

Just think Pigeon English in Hawaii, Brooklyn slang or English/British expressions....we all got 'em!
Y'all prolly think I'm dumb for using this but it ain't so. I just wanna get to the point faster without havin' ta use so many goddamn letters! ;D
by Damiana00 December 22, 2010
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'Probably' as said by people who live in the delusion of having an infinite amount of swag.
Chinoy : "Hi, I'm Chinoy. Prolly I'm busy right now. Why don't you leave me a message?"
by antweb December 26, 2016
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I prolly have forgotten any basic English I learned in school.
by raindance August 18, 2003
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A shortened form of probably, used mainly in texting and emails.

1: Are you coming over tonight?
2: Yea, I'll prolly show up for a while.
by Lyssa DL May 12, 2008
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Shortened version of "probably." Used by lazy people who justify the misspelling by claiming that it is faster to type 6 letters than it is to type 8 letters.
I could prolly save more time and appear less stupid by typing "prob" instead.
by Dream_On January 6, 2012
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1. adv. - shortened variant of "probably"; in all likelihood; likely. Typically used online.

1. You should prolly used "prolly" only in instant messaging. Using it in real life sounds kinda lame-o. But I prolly won't follow this rule anyhow...

Usage Notes: Using "prolly" and other forms of internet slang do not make one an idiot, unlike many of the arrogant people here have established. It is used simply because it is quicker to type "prolly" than "probably".
by Rerakudeshigunesu February 11, 2008
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