come from the latin word og gigglus bushus. it means a sac of some bomb ass chronic that is guarenteed to give you the giggles. also often used as a code phrase for your local drug dealer when you want some pot.
yo man, let me get a fat sac of that giggly bush!!
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).