A Relationship Experience Index (REI) is a number assigned to the length of one's longest relationship, which determines who else you can be with after the relationships ends. Basically you can only date people within your own REI.

REI Level 1: 0-1 years
REI Level 2: 2-5 years
REI Level 3: 6-10 years
REI Level 4: Over 10 years
Rick: Hey Consuella, wanna go out with me this friday?

Consuella: Sorry, I'm a REI Level 2 and you're only a Level 1. You KNOW that's not allowed!

Rick: It's ok, I'll just cry myself to sleep tonight.
by cokemidget April 11, 2012
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1. The adjective used to describe being active, rugged, or outdoorsy.

2. The outdoor and more store.
Sarah felt so REI when she spent time walking on a popular trail.
by outdoors January 9, 2010
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Hot butterfly that doesn't know how to swim
Nagisa: hey Rei let's pick out a new swimsuit
Rei: puts on a butterfly swimsuit

Nagisa: cool
Me: OPPA!!!!!
by Reiandrinareoppa August 11, 2017
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Me I am a Rei, we are very average and normal in almost every thing excluding sports occasionally. Our appearance is exceptionally average and so is our social life. We really aren't that cool, and have a tendency if being very annoying and overly passionate.
Hey look over there it's Rei
Oh yeah I'm friends with him
by Rei. D July 31, 2020
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A rare boy, if you get him never let go
Rey is shy, i made this for him i hope he sees it one day.
by reyshot April 18, 2021
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weeb time wwoohoo
Oh look at that dude watching anime their such a rei
by real_matt October 14, 2020
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A slang term for ecstasy made up by three drunk retards playing rummy in some shitty backyard. that soon became used by dumb idiots around rancho trying to imitate the way its pronounced when on the drug
Ervin Aldridge III: Hey want to pick up some rei. and get all fucked up?

Brendan: hell yeah!

Gilbert: u guys are dumb

Ervin Aldridge III: Shut ur fat mouth gilbert!

by rei4life March 14, 2009
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