Word typically used to describe a completely stupid, irresponsible and possibly dangerous plan of action that can often result in a frisk
1.
Dave: "Lets go on a mission"
Steve: "What shall we do?"
Dave: "Lets jump through fire in shell suits"

2.
Steve: "Lets go on a mission"
Dave: "What shall we do?"
Steve: "Let's go and smear nutella on the public toilets so that it looks like poo"
by Ali August 29, 2004
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DRUG CULTURE:
To be under the influence of some sort of stimulant (Ecstasy & MDMA are the main mission drugs i find) and go on a long walk round the streets or wherever you are probably talking shit with aload of mates along the way of this crazy little drug fuelled adventure you're having.
hey, where is eveyone?
They'll all twisted so decided to go missioning round town
by WildKatz July 7, 2011
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Putting hands or feet on a Correctional Officer in prison or jail.
Ex. 1

"A CO Mission is a green light to take off on a guard...It's usually lifers that are looking to do CO Missions. Cuz it don't matter. It's like asking for a life sentence to take off on the staff."

NateDogg916 "Mental health and surviving the lockdown, the SHU, and the art of structure." June 26, 2020

Ex. 2

Wes Wilson: Hey fool! You ready to put hands on the muthafuckin' cops just like the homey Matty Boy from Rodeo did?

Mikey Segala: Fuck yeah! You know what time it is!

Wes: CO Mission time muthafucka!

Mikey: Let's do this!

Wes and Mikey fist bump and air box. Then they go into the Program Office, ring the bell, and yell "I'm a bitch!" in unison.
by ZXY&ABC July 12, 2020
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Captialised by Leslie Mackerel in The Big Lez Show, it means to endeavour on an adventure that one can not put into formal language.
Sassy:"Watcha doin lez"
Lez:"I'm goin on a skitz mission cunt"
by RealChoccyMilk September 16, 2017
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Is to do some thing only a junkie would do. Often crazy drawn out tasks to get high. This inclueds any task to obtain money or drugs, Such as stealing or lookin for some one to get high with.
Cody's was on a god dam junkie mission,he walked 26 miles to get a bag of weed last night.

Josh: Wheres Your sister?
Jeff: Probably on a junkie mission.
by Mtownjw August 17, 2009
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A phrase used when you are about to do something cool, dangerous or hard
Oi look mate, I'm on a skits mission!
by rymaxam October 26, 2017
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