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A handshake constitutes an unspoken agreement to capture a seagull and deliver it to the other party when one party finds themselves in the presence of said birds.
Observer: "Wow, that's a rocking handshake! I can't wait 'til she gives him a seagull"

Rick: "Hey Ashlea. Thanks for the seagull. I now know how much our handshake means to you."
Ashlea: "You're welcome! I'd give you all the seagulls in all the beaches if I could."
Rick: "Gee. You are a true friend and we are both very funny and attractive."
Eavesdropper: "Hey, I was overhearing you guys talk about how funny and attractive you both are and I want you to know that it is true. Everyone says you are both very funny and attractive and the whole city of Baltimore wants you both as romantic and sexual partners but we know you can't choose us all so we are all very sad all the time."
Rick: "Thanks. That means a lot."
by NickCannon July 21, 2018
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1. The grasping of hands by two people, as in greeting or leave-taking.
2. Computer Science. An exchange of signals between two devices when communications begin in order to ensure synchronization.
by Anonymous March 19, 2003
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The most sacred form of sealing a deal.
A mutual agreement amongst two people to abide by clear and agreed upon terms.
Anybody who would break these terms is a gigantic faggot, see welcher
Men get sued over contracts, but men get killed over handshakes.
by ScrubbyNinja July 10, 2008
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Handshake - A type of currency used in the night life to pay for undisclosed services. Handshakes come in different denominations and sizes depending on the service and the hand.
Hi sir, I need to skip line. How much would it cost me. "It will be 2 handshakes".
by HMarz818 June 14, 2016
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march 19th is national handshaking day.

or

have you had your handshake today?
by Billy Bichititimen January 27, 2005
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