A: The the type of firearm which fires a .45 calibur, .45 of an inch wide, bullet. The origonal firearm capable of firing this round, the Colt 1911A1, was designed by the Colt Firearms Company in 1911. Due to the weapon's high-power, which is more powerful than a 9 milimeter round, the .45 calibur bullet is able to stop a potential assailant. Due to this capability, the weapons calibur has become quite popluar with law-enforcment, security, and even Military groups.
A: I pulled out my Forty-Five and popped a cap in that White-Boy.
by Robotsforabe October 28, 2003
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A new style flat brim cap that the brim flips up in the front to a 45 degree angle. This street/moto/skate look is becoming the rage on the west coast.
The Forty Five that bro's wearing is hella sik yo!
by Vettie01 January 05, 2011
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a sex act in which a man bend his partner over a sturdy object such as a table. While penetrating from behind, the man puts one foot on the table while leaving the other on the floor.
This leaves the leg that is up at a 45 degree angle relative to the floor.
To derive more force and depth from my thrusts and thus better unleash the fury, I gave her the forty-five.
by Sir D November 22, 2003
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To be that drunk your walking at an almost impossible angle, Amazing your friends with your ability to still be standing on two feet..
Did you see jarred forty-fiving? He was that drunk he would have won 1st place in a limbo contest..
by kingscrosspigeon October 15, 2011
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To angle oneself (does not necessarily have to be a forty-five degree angle) into an uncrowded area outside or inside a train or bus to gain an advantage in finding a good place to sit or stand.
Looks like I'm going to have to forty-five it before that bratty kid gets missile lock on my seat!
by pentozali February 08, 2006
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a euphamism for taking a girl from behind; doggystyle
"...then I went forty-five on the dingo and was so aggressive she dislocated her shoulder. Didn't even get to finish."

"Damn."
by grantaclause December 22, 2005
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