reg 

One who does not partake in the consumption of alcoholic beverages with their peers; Someone who does not consume alchol at a party intended for intoxicated individuals.

"Fuck, I hate regs, they just sit and watch you drink. They make shindigs wierd."

reg by Daniel Kobiaka March 17, 2004

Reg 

To pen someone’s nipple and stick your penis inside (the milk duct)

I am going to reg your mum

Reg by The regger April 14, 2023

reg 

One who can not handle relatively small amounts of cannabis; Someone who, after smoking relatively small amounts of marijuana, proceeds to vomit and pass out.

"I'm fine guys, I'm fine.. It was just a little thing back there..." "Are you sure, you seem to be a reg"

reg by NWA March 17, 2004

Reg 

Used as a noun or as an adjective.
A bad combination of retarded and paranoid.
Defined as possessive, psychopathic, bent on the destruction of happy people, insane and most likely incapable of thought.
Acts emo even if there's nothing to bitch about.

"Oh my God, did you see his new girlfriend? People say she's a Reg."

"Stop acting like a Reg, bitch."

"A Reg came between me and my boyfriend!"

Reg by In the Lala Land January 1, 2009

Reg 

Hands down the best person ever, the kindest and greatest man ever. This person is an utter heart-throb able to amaze anyone with his dazzling looks and charming personality. He is in general a great guy and is always willing to help a friend in need. Most people are in awe when looking at such an amazing person. usually wooing anyone he meets, he usually is doing his usual, caring for animals in need. He is so amazing, he was rated number one man by everyone. This man is amazing and has looks to kill for.

"Wow Reg is such a cool guy, super calm and chill!'

Reg by Ryu the Anonymoose November 6, 2017

Reg 

An actual cunt. Anyone with the name or nickname Reg has the smallest dick in the world. Anyone named Reg probably likes dick in his ass and adds ston to the end of every fucking world.

Oh, that guys name is Reg. Probably gay as fuck.

Reg by Big ol meech March 16, 2019

Reg 

An adjective used to describe a person who is acting like or constantly acts like a spanner.
Other forms may include Reggie/Reginald/Regina.

you're such a reg!

Reg by Matinmaniscus January 12, 2014