Heroin. A white, crystalline, narcotic powder, C21H23NO5, derived from morphine, formerly used as an analgesic and sedative: manufacture and importation of heroin are now controlled by federal law in the U.S. because of the danger of addiction.
"He opened his bag and found it packed with pounds of blast."

First noticed on the TV show Bones entitled "The man in the mansion", first aired February 14, 2007.
by Arkaxow April 01, 2007
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Violent diarrhea. Most commonly found on public rest room walls, floors, or on the back of toilets. Also known as “AMD” or “Almost Made it Diarrhea” it occurs when a person with diarrhea is in dire need of a rest room and almost makes it to the toilet bowl, but ends up shitting all over everything else in the stall.
Did you clean the mens room? Hell no! Someone had blast all over the place in there.
by M. Jordan January 18, 2008
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taking a hit of weed
dude, lets go take a blast. or do you think george wants a blast?
by yogit July 03, 2009
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