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1.
A method of describing a journey or task or great difficulty, boredom, or length.
"We had to pick up, mission it all across town, and drop off in Lizzie's."

"I'm on a damn mission with the wind blowing." (ie: Rolling in the wind.)
by Ian February 20, 2004
 
2.
A very arduous task. A job that is very strenuous, and takes a long time to complete or even to attempt.
"Write a 5000 word essay? What a mission!
by NZAzN K' October 19, 2003
 
3.
Spanish quarter of Frisco. Where you can get a taco and a greencard from the same shop. Like East LA. 24th street is the Nortenos, 20th-18th is the Surenos and 16th street is the crack heads and potheads.
Where you from homes?

24th and mission, fuck 18th scraps
by Hyphy_Crunk_Pumped_Amped August 27, 2005
 
4.
U.K South London slang

word describing a long amount of time taken to get somewhere

From the idea of a mission being something which takes along time to complete.
Beckenham! Ah Bruv das missions!
by Gigi July 13, 2004
 
5.
an excursion/field trip taken at an un-announced time, necer during daylight with a purpose know to only those involved with it
dude we need to go on a mission tonight!
by Mutley the dog December 19, 1999
 
6.
the act of going somewhere to have sex with a chick, usually used when running a train
Im bouta go run a mission on dis hoe that jus moved down the street. Ya'll comin?
by mikejones July 01, 2004
 
7.
A hard or unnecessary task to fulfill.
Okay, but this is going to be missions.
by bubblepop August 02, 2006