1 definition by MikeS55

Overestimating your ability to drink to the extent that the rest of your night is spent learning that you missed your limit considerably.
Did you see the state of the mens jacks at Kealan's?
Ya looks like someone was Doing a jonny..

Do you guys have enough buckets for if someone ends up.. you know... Doing a jonny?
by MikeS55 March 07, 2012

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