A term used to refer to somebody that is capable of inflicting high amounts of harm and damage upon any unfortunate person that happens to anger them; an absolute weapon; the hard man of the town. These types of people, from whom I advise that you stay at least 500 kilometres away, are incredibly dangerous and can win a fight against even the toughest silverback gorilla.
Josh: "Fuck you."
Harley: "Woah. Lethal specimen."
by BigLadIzaac March 11, 2019
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My name is mac lethal I'm a fire sign leo, alcoholic, anti mall, anti hero, anti soccer mom, anti hipster. Pro eating captain crunch cereal for dinner. Pro taking bong hits to cure your depression and pro demo CD if you got one let me check it. But never ask me what the hell I'm laughing about. Cya later, I'm going to go take a nap on the couch.
by JJolly May 19, 2008
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The act of ejaculating inside a girl when not wearing a condom when you have HIV/AIDS, thus giving her the disease.
I wouldn't fuck him if I were you, he likes to give girls the lethal injection.
by 35 Home May 10, 2010
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An intense form of the term, epic fail*. Refers to an action that typically results in fatal consequences.

Started by Nikki, spread by Sadaf :-)

*Epic Fail: A mistake of such monumental proportions that it requires its own term in order to sucessfully point out the unfathomable shortcomings of an individual or group.
"Her lethal fail was beyond epic proportions when she wore those hideous shoes in public."
by NASH Love June 1, 2009
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lethal pants is when a man gets a boner that could possibly kill someone or that he may rape a man or woman.
"Yo Simon, tell yo girl to keep away from jack, he's got some lethal pants"

"Hey Carly, watch out for jack he has lethal pants!"
by ExpertOnEvrything69 May 29, 2017
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Badboy MC from London. Grime is his genre, and Fire Camp is his crew.
"Ooooow! Lethal Bizzle Records"
by ehs5 July 22, 2006
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Totally awesome action movie series following the lives of Roger Murtough and Martin Riggs. Funny, with plenty of actin.
Lets go watch Lethal Weapon 4, because Chris Rock is a total legengd.
by Seven November 17, 2003
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