Strange Brew, and comedy based off an SCTV sketch. Even if you didn't know that show you'd recognize a lot of the actors from it.

Some of my favourite Canadian films:
At Home by Myself… with You (2009)
The Baby Formula (2008)
Bang Bang Baby (2014)
Bon Cop, Bad Cop (2006)
The Changeling (1980)
Closet Monster (2015)
Crime Wave (1985)
Cruel & Unusual (2014)
Cube (1997)
Don't Talk to Irene (2017)
I am a Good Person/I Am a Bad Person (2011)
The Mask (1961)
Menteur (2019)
Mommy (2014)
Natasha (2015)
Porcupine Lake (2017)
Scanners (1981)
The Twentieth Century (2019)
Videodrome (1983)
War Witch (2012)
Wet Bum (2014)

You took it with Cronenberg.
Bettah Buttah that toast.

All the early Cronenberg stuff: Shivers, Rabid, The Brood, Scanners, and Videodrome.
Visiting Hours - better than average slasher film starring Michael Ironside.
Black Ice - another good Ironside flick.
Strange Brew - good comedy, eh?
Black Christmas - the best slasher film ever made imho.
Curtains - another good slasher film.