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1.
its where you smash somebody in the leg really hard and there leg goes like numb, and they have trouble moving it because you just smashed it.
Dooge: man just shuts aop!
Matt: DEAD LEG!!!(smash)
Dooge: ow man shits!
by matty November 07, 2004
 
2.
(Britain, Ireland): A leg that is painfully numbed, stiffened, or cramped by impact such as by a deliberate or accidental kick or other blow.

Known as a charley horse or charlie horse in the United States where it can also mean a blow to the arm, often given during horseplay.
* He lashed out with his foot and gave him a dead leg.
by Josifer March 15, 2012
 
3.
A painful swelling, normally in the thigh, caused by a punch or quick blow. Bruising and discoloration tend to follow dead legs and leave the victim with a numb leg that is hard to walk on. Normally occurs between guys but rare instances of girls giving guys dead legs have been discovered. Also known as a Charlie Horse.
Claire: Hey I don't know what a dead leg is.
Will: Hey you're right.
by Bootstrap Will February 04, 2010
 
4.
When a girl just lays there during sex and doesn't put in any work at all.
Man, I was gettin in this girls guts and all she did was lay there! Damn dead legs!
by t187 June 15, 2013
 
5.
where you punch someone (not kick cause only punching works otherwise its not called deadlegging) in the area between the ankle and calf on the lower leg, causing the person to collapse or yell in tremense pain.
Oh shit Libby just deadlegged jonnie and now he is crying like a baby on the floor!
by Zack Roudebush November 07, 2005
 
6.
a member of your team or group that does not pull their own weight. Similar to dead weight but in a team environment.
We all tried to climb up the mountain together but one of our team members was being a dead-leg.
by Talonx September 25, 2008
 
7.
Nickname of a usless brother-in-law who is totally gormless. Enjoys fishing (the sod with a rod!) and lying about how fast he drove his car on certain roads.
Dead Legs: Can I use your car to put my fishing gear in it?
Me: NO.
by LabMouseAntics November 08, 2004