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1.
To greet someone by approaching them, and giving them a backhanded slap across the face.
Give him an irish handshake and he'll shutup
by BHN April 19, 2006
 
2.
a greeting given to a male adversary consisting of grabbing him by the balls and squeezing as hard as possible until he doubles over in pain, then headbutting him in the bridge of the nose.
"If you think he's too big to take down otherwise, give him the old Irish Handshake, he'll be on the ground bleeding before he knows what hit him."
by EquenzuOja April 17, 2010
 
3.
When a guy is throwing up and receiving a hand job from a girl at the same time.
"Hey man, you just puked all over the car and that ho gave you a irish handshake"
by Toan To April 04, 2006
 
4.
When a guy is throwing up and receiving a hand job from a girl at the same time.
"Hey man, you just puked all over the car and that ho gave you a irish handshake"
by Toan To April 04, 2006
 
5.
When a guy is throwing up and receiving a hand job from a girl at the same time.
"Hey man, you just puked all over the car and that ho gave you a irish handshake"
by Toan To April 04, 2006
 
6.
throwing up when getting a hand job
i totally got an irish handshake and it got all up in her hair.
by hayzus April 16, 2006
 
7.
When a guy vomits and gets a handjob at the same time by a girl.
"Boy you were sick, did you just get an irish handshake behind the barn?"
by William Winslow April 04, 2006