Endo

[Justin Bieber]

The bottom tips of the marijuana plant that accumulate the most resin and crystals after being hung to dry.

[Becky]

1. Chronic.
2. A wheelie on a bike/motorbike with your back wheel off the ground.

[Justin Bieber]

Facepalm! Jeez there are a lot of rookies chiming on this word.
Endo as a term referring to a type of marijuana does not come from indoor. It is a mispelling of the term Indo, which refers to one of the two species of marijuana, Cannabis Indica. Indica is said to provide more of a relaxed, body high whereas the other species, Cannabis Sativa, is said to create a higher energy, more cerebral high.

[Jason Yan]

where the front brake of a bike is applied with the intention of raising the rear wheel into the air

[Jessica]

crashing your mountain bike such that your rear tire goes over the front one during the course of the crash.

[Sonia]

V. To be thrown over handlebars on a bicycle or a motorcycle. Usually occurs when a rider applies only the front bake, causing himself to be thrown from the bike.
N. The act of being thrown over handlebars on a bike.
Alt. forms: Endoed, endoing

[Jessica]

MARIJUANA

[Little_Girl]

1.Verb. To [crash]. Usually but not limited to a bicycle or motorcycle. Short term for end over end or end over the front First coined a term in the mid 1970s it has gained several meanings included its 1990s [Urban] noun usage for [marijuana]. Cars and trucks can do an endo as well as any moving object such as the human body.

[Becky]

The act of crash landing any wheeled vehicle on the front half of its wheeled chassis, with the rear half still in the air. Typically used in reference to the 2-wheeled variety while completing an airborne stunt or trick, and the rider lands front wheel first with enough force, that they flip over the handlebars.
Endo comes from the term END OVER END

[Donald Trump]

A kaying move where the front of the boat submerges causing the entire boat to stand vertically in the water.

[Vania]

Internal; within.