M25

The London Orbital Motorway, 10 lanes wide (in places), about 100 miles in circumference and with traffic moving at about 15 mph. Also used as the term to define the limits of the area covered by Greater London

The M25 always tops poles for the worst road in the UK.

by black flag June 25, 2004

m2sbr

(n), a mystical universal force from which players of Myth II: Soulblighter draw their skill and Mythcool.

"Omgz, Drizzt is such uber-m2sbr"

by Strykr/Mad Dog June 24, 2005

M240B

A 7.62x51mm light machine gun used by the U.S. military. It looks very similar to the M49, but is an actual machine gun, as opposed to an automatic rifle, also, it is significantly heavier than the M249 (especially if you're the one carrying it). Pronounced "Em two-forty bravo". Nicknamed "The Pig" or "Two-forty". Commonly carried into battle or mounted on a Humvee. The M240B is a devastating weapon.

Extremely tired soldier: "This M240B is a heavy son of a bitch!"

Squad Leader: "Private, I hate you, you're the new 240 gunner."

Lieutenant: "Haji with an RPG! Light'em up with the 240!"

by EMxaoc October 16, 2008

M2M

Really amazing pop band, formed by Marit Larsen and Marion Raven. They had 3 albums - The Big Room, Shades Of Purple and The Day You Went Away (greatest hits). They have broken up, and now they are singing individually.

M2M is the best girl-band ever!

by Backstreet boy July 6, 2008

m2b

m.2.b = meant to be....

they are meant to be(m2b) friends

by Guizzy Boy November 18, 2007

m-4a1 m203 assualt rifle

The M4 is light and more durable than the m-16 but is a smaller version.

Caliber: 5.56mm NATO
Action: Gas operated, rotating bolt
Overall length: 838 mm (stock extended); 757 mm (stock fully collapsed)
Barrel length: 370 mm
Weight: 2.52 kg without magazine; 3.0 kg with magazine loaded with 30 rounds
Rate of fire: 700 - 950 rounds per minute
Maximum effective range: 360 m

by Lancer Fox July 30, 2003

m-4a1 m203 assualt rifle

The M4/M4A1 5.56mm Carbine is a lightweight, gas operated, air cooled, magazine fed, selective rate, shoulder fired weapon with a collapsible stock. A shortened variant of the M16A2 rifle, the M4 provides the individual soldier operating in close quarters the capability to engage targets at extended range with accurate, lethal fire. The M4 Carbine achieves over 80% commonality with the M16A2 Rifle.

The m-4a1 m203 assualt rifle is similar in design and functioning to the M16 family of rifles. Compared to the M16A2 rifle, the M4 Carbine is 1.3 pounds lighter, 6 5/8 inches shorter with buttstock extended, and almost 10 inches shorter with the buttstock collapsed.

by bob909 September 27, 2005