A special size condom which is only available for those with a larger than life penis.
Comes in many flavors.
Many originates in Germany & Philippines.
"Woah, do we need to go to Germany tonight?"
"Gosh, I love the flavors on those Magnums!"
by Bhahahaha @ life. March 6, 2009
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1) A person with an abnormally large penis
2) The Japanese singer Gackt
1) Yeah, I slept with that guy last night. He was a real magnum!
2) When asked about his penis size, Gackt replies 'I'm a magnum."
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Erick Zoolander's newest look.
Can stop ninja stars.
It's magnum!
by Hans February 5, 2004
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A cartridge which is more powerfull than a normal round of the same caliber, or a gun made to fire such a round. As there is no precice definition of what is a magnum round and what is not, the name is up to the designer.

Magnums are most commonly used in revolvers, but are also used in semi-automatics and rifles.

Magnums, while powerful, will not "blow somebody's head off" or kill anybody with a single shot. As with all rounds, they will not kill except by central nervous system damage or by blood loss. While a magnum round will most likely cause more damage than a non-magnum the location the round strikes has more effect than anything else, and even a round to the chest should not be assumed to be a automatic stop. Look at Richard Blackburn, who was shot five times in the chest with a .357 magnum, but survived and returned fire, killing a South Carolina state trooper, Mark Coates, with a .22LR handgun.

There are many magnum rounds, but some of the most popular include the .357 magnum and .44 magnum. Also worthy of note is the .460 Wetherby Magnum, a _very_ large, powerful rifle round for large game hunting.
A .460 Wetherby Magnum will stop anything it can hit properly. It is what you use if you want to hunt an elephant.
At the other end of the scale is the .17 HMR, which is only very effective against fairly small animals.
by .460 September 6, 2006
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Most
Aggravating
Goddamn
No good
Useless
Motor
dodge magnum engines are more noise than go. the most aggravating goddamn no good useless motor ever built. but its a mopar, so what do you expect.
by runn141 May 17, 2009
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When someone buys the biggest gun they can find even if they can't control it while shooting. They think it makes them more of a man.
Guy 1) That little punk carries a Smith & Wesson Model 500. He falls over when he shoots it and doesn't even know what the bullet hit. He is compensating for something!
Guy 2) He's got a bad case of Magnumitis
by Livingtolong October 5, 2019
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