To make a mistake, an error. Normally happens from not following instructions.
I think you may have done a ronnie on that job you were working on, did you follow the instructions?
by Mik the Pike September 18, 2006
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someone who doesn’t get the hint that a female isn’t interested. Does the most but still can’t hit.
literally all we did was go to a party and he was texting me after saying how much he loves to spend time with me and i’m so special to him. i’ve only met him twice he’s such a RONNY
by IGCG December 29, 2020
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A fat grease ball who will lick your asshole for a dollar.. Also a short fucker who will bum off of your upgrades and tickle the customers fanny to make the sale and in some cases give them a reach around
Aw fuck richard it's ronnie
by dick shithammer October 14, 2014
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A roll up cigarette

Made with a Rizla, Filter, and Tobaco
Nice ronnie there g-unit
by Darkjedi November 27, 2006
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"i just bought a gram of that ronnie and now i'm nodding out. i think i'm gonna puke."
by jeff July 17, 2008
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Fat man titties that are so volumptious you cannot resist them. They are very saggy and the nipples are nice and round.
“Holy zucc man, that guy right there has some massive ronnies!”
by Will jowers fan boy April 20, 2019
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