Twinnay 

Two bestest friends who have everything in common and are so alike that they consider themselves as twins, hence the colloquial 'twinnay'.
The term can be used in third person context although can also be addressed directly to the other person.

'That's Tara, she's my twinnay!'
'Heyy twinnay, how's it going?!'

Twinnay by Spudsasaurus November 4, 2011

Twinny Twin Twin 

Two dime bags of marijuana.

We gonna get high today, cause I gots us a twinny twin twin.

Twinny Twin Twin by Da Moose July 23, 2005

Twinny 

A person who you identify as a your twin whom isn’t related! Has the same interests, habits and crazy mindset as you. Usually a Twinny is a person who you slag off constantly but is still your best friend.

Josh you are an evil minded Bitch just like me! You’re definitely my Twinny!

Twinny by Misslucy January 19, 2019

twinny 

two really cool people who think the same and are really awesome

you my brother from another mother, you're my twinny.

twinny by twinnnnnyyyy September 21, 2010

twinny 

Two really cool girls who think alike.

When you think of twinny, think Romy and Michele from "Romy and Michele's High School Reunion."

twinny by twinnyyyy January 16, 2008

Twinney's Pond

noun. A cliche, small town, casual pot-smoking pond.

"Hey, bro, let's smoke up at Twinney's Pond."

Twinney's Pond by dillrick January 5, 2012

Twinny Twin Twin 

the number twenty; a twenty dollar bill

I gots me a twinny twin twin ridin that pony.

Twinny Twin Twin by Asvetic December 27, 2003