The act of placing one's anus on their partners nose and shitting furiously onto their face. This became a common act in Ireland in 1916, when Irish wives would shit on their partners face before they fought the British. A Coffey Handshake is most commonly used nowadays to make sure a partner doesn't cheat on another partner.
As the morning dew settled Bonny sat her greasy asshole on top of Frankie's pointy nose. She then began to release a flurry of shit onto Frankie's face and into his nostrils. This was The Coffey Handshake, so Frankie wouldn't fuck that thot , Paula at work.

"My wife gave me The Coffey Handshake the other night"
by Fannymcfee October 22, 2017
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