(verb) the act of hanging out in a group at someone's house and taking large quantities of MDMA.
dude... you guys were monging on my lounge last night.
by superm0nkey May 6, 2007
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Short for mongrel. A term usually used to describe someone who goes off with your ex boyfriend the minute you split up. At the same time she is also a 0 rating on the stunning scale and can often look like a ugly dog or horse. The mong also tends to buzz off presents you bought the ex, unknown to her.
How did you break up?
Oh he went off with a mong.
A Mong?
Yes, apparently a dog was let loose out of the kennels.
by scoopdapoop June 19, 2011
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A fast-spreading term meaning to relax; procrastinate; sit and timelessly observe your inner feelings, often after taking cannabis.
I'm really stoned, lets mong for a while.
by JimmyD August 31, 2003
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thongs meant for the male gender
Example 1: Wow thats one foxy mong you got on there buddy. Loving the red lace.

Example 2: Bro I got mongs for a great deal this weekend. Now, I won't have any gnarly underwear lines when I wear my jeggings.
by quinoaforlunch February 14, 2016
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Mong could be a word used to substitue other words. It could act as a pronoun, noun, adjective, verb, gerund, anything! Mong could be the most flexible word there is.
"I just monged another Soduko!!!"
"Why are you being such a mong??"'
"Hey, hows it monging?"
"Dude, that is so mong!"
"Mong loose!"
"Wow, he just threw up! He's such a monger."
by idee93 August 17, 2011
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"Mong is the stuff that comes out when you push down on a pregnant woman's stomach."

- Southpark: Season 3, Episode 17, "World Wide Recorder Concert"

- A New York boy defines this word for our favorite four youngsters from Southpark, Colorado. Cartman came up with the word "mong" to call out the kids from New York, b/c they believed it was NOT a word.
My mom is so pregnant that when I sat on her tummy, mong came out of her like Niagara Falls.
by Misamore December 27, 2011
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