Quite possibly the cheapest, most stable, most easily made and most easily acquired explosive that an average joe, wanting to blowing something up for the sake of fun, can make. Flash powder is commonly used in M80s, silver salutes, firecrackers, and cherry bombs as well as large scale salutes seen in professional fireworks shows. It consists of two components: finly powdered aluminum (2 micron), and potassium perchlorate mixed in a ratio of 3 parts aluminum to 7 parts potassium perchlorate by weight. Both of these components are perfectly legal to purchase, and can be purchased online by anyone, of any age, who has a credit card. The aluminum must be a very finly powdered flake style usually sold under the name indian black or german blackhead. It can be bought from eBay. The potassium perchlorate can be found at any number of internet suppliers. 1 pound of flash powder can be made for only around $20.00 US, although a typical device like an M80 contains only 5 grams (1 lb = 454 grams). The power of flash powder can be increased significantly by adding additives such as: sulfur, antimony sulfide or just simply black powder in small amounts, typically 8-9 parts flash powder to 1-2 parts additive. This however, decreases the stability and could cause spontaneous ignition especially if the additive is not free of acid. Flash powder is scientifically designated a low order explosive meaning it burns quickly producing a great deal of energy in a small about of time. Legally it is classified as a high explosive. Due to the ultra high burning temperature of aluminum the rate of burning in flash powder actually reaches the speed of sound causing a detonation like a high explosive. This requires a critical mass of 50 grams in order for the flame front to acheive the speed of sound. For this reason quantities of flash powder in excess of 50 g do not need to be confined within a container in order to explode.
by Mr Ananomous February 08, 2007
v. to fuck someone most vigorously and rapidly, as if one were The Flash.
n. a nonincendiary explosive which creates a concussive blast of sound and a temporarily blinding burst of light.
n. a nonincendiary explosive which creates a concussive blast of sound and a temporarily blinding burst of light.
Henry: Ha ha! I got you with my flash bang!
Chris: Oh yea! *bumps into a wall* Well I flash banged your mom last night!
Chris: Oh yea! *bumps into a wall* Well I flash banged your mom last night!
by Aktopus December 07, 2004
by KING MAISON May 09, 2008
When using FB check-in and you tag not only the group you are with, but start tagging random people in your friends list causing havoc.
Eddie checking his FB feed: Damm it I got Flash Tagged again! If my wife sees this she'll think I was out again and I'm gonna get cutoff.
by Mikeyl16 April 26, 2011
When a female who realizes that the story she is telling is not so interesting saves it by ending the story with, "and then I took my shirt off".
"I went to the library and it turned out that the book wasnt late like i thought... and then I took my shirt off". Flash Ending
by j-c-c March 20, 2009
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The Famous Flash is a tradition that hot teenage girls seem to enjoy. It starts at 11:30pm every saturday night at the Fremont and Aurora bridges in Seattle, Washington.
At 11:30, the girls flash every car that comes by and then make a run for it.
It's pretty great.
At 11:30, the girls flash every car that comes by and then make a run for it.
It's pretty great.
by 2ballinbitch January 13, 2009