A person who usually is unafraid to say their true opinion, talks in perfect grammar, and is a little bit insensitive to others feelings.
If a Viper joined in chat in the middle of a conversation, they would look at the previous messages and give their opinion on the subject. They'll coversate from there, they'll say hello to whoever says hello to them.

A normal person would simply say hi.
by Whale Shark Is mentally okay October 03, 2021
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When urine comes out in two streams
"Man, what happened to your pants?"
"Dude, I had a viper"
or
"I had a little viper going"
by Bill G August 12, 2004
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1. One of the fastest production cars built. Not too well-mannered, but the ultimate sports car nonetheless.

2. Oh, yeah...an Old World snake with a thick, heavy body, and a pair of hollow fangs; adder.
"That guy's Viper is a real Corvette killer."
by tradesman April 01, 2003
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The Lockheed F-16 Fighting Falcon. Coined by early pilots likening it to the Colonial Viper on Battlestar Galactia.
The Viper took off from Gunsan Air Force Base in South Korea.
by Colin Ritter August 06, 2003
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The Dodge Viper is the most kick-ass car around. It totally owns the Corvette, no matter what anyone says.
"Although, the old Viper was cooler-looking; the current model isn't as luscious as the old one."
-me
by Dave October 21, 2004
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An adjective that is synonymous with extremely cool, awesome, amazing, etc. Mostly used by people of the "hipster" classification, but is also common among others.

Originated from blogger Dan Bergstein on "Sparknotes."
Jenny: "Hey, look at my new shoes!"
Melissa: "I love them, they're so viper!"

Emily: "Hey, are you going to Heather's party this weekend?"
Sofia: "Yeah, I heard it's supposed to be viper!"
by born2perform313 February 15, 2011
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The process of fingerbanging someone with your pointer finger and middle finger crossed.
Bro, I did the Viper last night!
No way bro?!!
Yes, way! She loved it!
by beremiecancilla June 20, 2011
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