To stab (or "shank") another person.

Performed using a sharp, knife-like object which is usually concealed in one's person, it is often used as an informal salutation or greeting toward others whom one is not in good standing with.
"I heard Andrew's gonna give his old mate Stephen a British Handshake next time they meet after that scrap they had at the pub last week"
by Melutox September 29, 2022
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Pouring highly corrosive acid in someone's face
I give my ex-husband a British handshake to show him that I was right.
by conze97 March 5, 2023
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Upon greeting a lady, a gentleman must place his hand in her cleavage and shake his hand to and fro to shake her breasts. To not do so is a horrible insult.
Did you hear that Mr. Darcy insulted Lady Jane by not greeting her with a British Handshake?
by the london gentleman November 13, 2013
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