Marijuana which has been grown indoors using lights and chemicals. Quite dangerous as the grower usually does not take the two weeks required to "flush" the plant on water alone, thus removing the phosphors and fertilizers out of the plant, so the smoker will quite likely suffer mental problems, possibly even after a short while but will suffer them eventually. see weed, ganja, chronic or bud etc.

Hydroponically grown marijuana

Marijuana grown indoors using a hydroponics system (tubes and filters with water and fertilizers). To correct the first definition, NO marijuana causes mental problems - but it does get you really high.

most excellent weed grown in water not dirt

Hydroponically grown marijuana of good quality. Often called "hyge" for short.
Also used to describe the hydroponic setup used to grow the weed.

Hydro is a better type of marijuana because you will get a more enjoyable high when smoking it. For example smoking regular weed will make you tired.

hydro ( a.k.a hydroponic ) is a high grade marijuana. It is grown by using hydroponics ( hense the name hyrdo ). Hydroponics is an alternitive to growing the seeds in dirt. It is usually grown in water just like lilly pads grow.

Hydroponicly grown marijuana, usualy a very strong marijuana plant, and is usualy one of the best buys if you are low on cash.