Comes from the word INDOOR. Unlike outdoor (outdo') endo is Marijuana grown indoors. The term has come to mean better and more potent kind of weed, as the quality of indoor is generally better, although that's not always true...
by dusio February 25, 2008
Get the endomug. Evil disease that can't be cured and no-one knows where the hell it comes from. It causes lots of pain and lots of other horrible problems.
Shortened from endometriosis
Shortened from endometriosis
by aurelia April 1, 2003
Get the ENDOmug. noun; plural endo, (occasionally) endos
Today there are two popular meanings for the word endo (it's a matter of opinion really):
1.) The first term that was created (which many people still see as still the only correct definition) simply refers to weed that is grown indoors.
2.)Today the term has gained popularity and therefore been a tad manipulated, so endo is also used to describe any decent weed, chronic, or as i like to say, "fuego." This kind of weed typically has red hairs and very visible THC crystals that look like mini jewels.
Manipulation explanation:
Typically the endo is usually better GROWN than the outdo. That's not to say that sunlight isn't the best light out there (or that you couldn't take a crappy outdo seed and make it decent with a little TLC) -- but indoor growers usually grow hydroponically w/ some of the best marijuana-marketed fertilizers out there. Also much outdoor weed is either damaged from shipping across borders, or just from it not being tended too very well -- being that the these aholes usually have fields upon endless fields of the shyt.}
Today there are two popular meanings for the word endo (it's a matter of opinion really):
1.) The first term that was created (which many people still see as still the only correct definition) simply refers to weed that is grown indoors.
2.)Today the term has gained popularity and therefore been a tad manipulated, so endo is also used to describe any decent weed, chronic, or as i like to say, "fuego." This kind of weed typically has red hairs and very visible THC crystals that look like mini jewels.
Manipulation explanation:
Typically the endo is usually better GROWN than the outdo. That's not to say that sunlight isn't the best light out there (or that you couldn't take a crappy outdo seed and make it decent with a little TLC) -- but indoor growers usually grow hydroponically w/ some of the best marijuana-marketed fertilizers out there. Also much outdoor weed is either damaged from shipping across borders, or just from it not being tended too very well -- being that the these aholes usually have fields upon endless fields of the shyt.}
by Your future President July 25, 2009
Get the endomug. 
by waynejohn186 January 4, 2008
Get the endomug. by Ümbra January 11, 2005
Get the endomug. it means inner and is also known as weed that is grown indside. - endo when refferred to dank weed doesn't come from the word "indoor", thats a stupid supposition. it comes from the word inner because its grown on the inner part of a house. number 3 answer, your an idiot, hopefully you will be the number 4 answer now. in no way is your answer correct. everyone on urban dictionary is now dumber because of your definition, may god have mercy on your soul.
by tenessee March 25, 2008
Get the endomug.