The act of just relaxing and chilling out, sometimes (though not necessarily) whilst or after having partaken in the smoking of Cannabis.
Monging usually takes place around the house however could occur in any comfortable exterior location of choice, e.g. sauna, field, hottub, etc.
Origin presumed to be from mong as in the act that such a person performs.
I'm gonna go mong for a bit.
He's just been monging about all day.
She just mongs all day, never does any work.
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