Mong off 

When 2 people smoke cones back to back and both try to not mong it before the other person

Lets have a mong off

Greg monged it on his 5th cone, decent mong off

Mong off by Mong off January 2, 2022

mong off 

Another way to say go away, fcuk off, get lost.

I wish you would mong off and leave me alone.

mong off by F A B Scott May 19, 2006