Bulbing when a person has taken a large amount of class A drugs an is "off there face" you would call this bulbing.

The practice of smoking Crystal Meth or Crack Cocaine out of a lightbulb.

a good idea.

derived from classic cartoons when the characters have a lightbulb appear above their head when they have an idea.

Is a person who is an absolute dimwit.Used in Liverpool,UK.Can be used when they are also useless in most every day scenarios.

General term for well meaning but unreliable person, often intelligent but prone to lapses in concentration and brain function.

n. A light bulb, although usually used for lamps and such, can be used to smoke meth.

A small, 1 serve cannister of Nitrous Oxide used for getting a kinda fun, but quite pathetic 5 minute high.
Possibly puts bubbles in your brain.