Top Definition
something that you hold onto to secure oneself or control when in motion or what is in motion
Scott pulled back on and held Becky's long hair like reins as he spooned her.
by neomuzic August 03, 2005

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a slang for the most awesome guy in an group of people
That guy must be rein in here
by multinectar January 17, 2013

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1. Gestural greeting whereby the greeter extends both hands in the hope of both being grasped and shaken by the opposing party. Shaking both hands rather than just one displays extra enthusiasm and/or sexual desire.
"Sir, I am honoured to meet you. Allow me to give you the reins."

"You're looking fine there, girl. Give these reins a good shake."
by Rein luvva December 13, 2009

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A Rein is a person who's an extremely amazing human, a dork at times with a cringy sense of humor. However is dependable and reliable that keeps it a 100 around the blocc.
Everybody loves a Rein except when he acts like a whiny bitch.
by Drzoidbeetle January 05, 2017

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a cool type of duct tape in Philippines
Hey can I have some rein duct tape for my deer?
by gluesy August 15, 2011

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