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1.
What people in the West-Island call Devil's Night (the night before Halloween). It got it's name because people steal door mats and do switcheroos. It is also the night people go around TPing trees and other mischief is caused.
I woke up this morning after mat night and my doormat was missing. I found it the next week three blocks down.
by Daniel October 31, 2005
 
2.
1. n. West Island Montreal-- The night before Halloween when pranksters roam the streets, TP trees and egg houses. The name remains, but pranks have been down in recent years. Origin unknown.
I went out on Mat Night and egged that bastard Jean-Francois's gas guzzling SUV real good!
by G.H. Hadden May 04, 2005