To relax but in an entirely unproductive manner. Essentially sit in you own filth and do nothing useful.
Not today man, I just need to mong out for a while.
To be so stoned you can't move or think straight
-Hey I guess we should go to this party then?
-Fuck that lets just smoke the rest and mong out to Takeshi's Castle and drum 'n' bass, there's a double-bill at 4:20am
-Hey where've you been?
-Sorry we were just watching this new District 9 shit
-Oh yeah, whats it about?
-dunno
Based on the often offensively used word mong.
1. To be in a state of unfocussed frenzy.
2. To be in a relaxed and docile state.
1. "Whoaa, did you see Nev after 14 bottles of Bud? Biggest, worstest mong out I seen for a while."
2. "Hey guys, let's get a spliff going and mong out in front of the TV."
A term used to refer to someone who is unable to speak due to a large intake of cannabis
Don't even talk to that guy, he is monged out!
Basically - Zoning out, going into a daydream like state and you can't help but do so. When your eyes become fuzzy and you love to stare at an object in front of your eyes.
It's both a natural thing that happens and can also be caused by smoking weed.
The come-down after smoking marijuana
Shit man- i'm monging out