Top Definition
ZM
ZM is another name for a male "slumber party". It involves staying at ones house and staying up watching movies and playing video games. Originates from the word Zombie-marijuanathon. It involves smoking weed while playing call of duty.
"Dude! ZM at my house tomorrow"
by Poonmarijuana May 30, 2016
ZM
1. Not ZIMA 2. Not Zowel Movement 4. there is no 3 5. Don't try to !urban me!
I tried to !urban ZM and I failed. I fail at life :(.
by Alfred Stoner February 16, 2005
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