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 10, 2008

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The lazy and misspelled use of the word "probably".
She didn't get on chat today, and prolly had to go to work.
by Halfshell March 17, 2013

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A shortened version of "probably." Known to be used by Tyler Joesph, the all amazing smol bean of Twenty One Pilots.
Person 1 - Yo, will you go see that new horror movie that's out?
Person 2 - Yeah, I prolly will!

Person 1 - Okay, see ya there!!
by penceyprep June 17, 2016

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Short for probably. Used by only OG mofo's, Cholo's and gangbangers
Dequan: Yo, we gunna do that driveby we talked about earlier
Filisha: Prolly
by SwaggieMcsweg January 24, 2015

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Short for the term "probably"
It is prolly the case that this word was trademarked by Mariah Wheat against her beautiful wife Amy Green who tried to steal such a magnificent word in attempt to lay claim to inventing it. Boo-yah.
by Seadog92 November 28, 2014

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Shortened version of the word probably
I will prolly attend my sisters' graduation, although I may dip early!
by jessIh13 April 22, 2016

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Internet shorthand for probably.
You prolly should've just went yourself it would've taken less time.

probably probability
by TheBigCanucklehead March 14, 2015

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