Top Definition
An activity participated by many teenagers in Timmins Ontario, Canada. It is a long weekend in may where teenagers go in the bush all weekend, sleep in tents, get shitfaced and have the best time of their lives. This event takes place mainly because there is not much other things to do in Timmins.
Man I can't wait for may run I'm going to get so drunk!
by quick122 April 30, 2007
Photos & Videos
An Event that takes place on the long weekend in May, were fishing season OPENS, friends and family get together go camping and fishing, drink lots of beer and/or other liquor, and eat lots of camping food!
I am going fishing with my family for May run this year.
by Ladymommy May 16, 2016
It's mayham and action all in one.

A meltdown in a relationship and you should run away.

A train wreck in conversation is about to occur and you should exit the building immediately. Don't wait for the mayham, just run.
It's a possible meltdown in sector five. All Mayrun has broken lose.
by jrose May 18, 2006
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