Twincest 

A form of incest between twins. Twins having sexual relations.

There is often fanfic involving twins such as Fred and George Weasley having sex.

"I just read this really odd fanfiction that involved a lot of twincest!"

Twincest by epsilina August 4, 2007

Project Twins

When a man gets two diff. women pregnant at the same time.

"Man, you heard about Rob?"
"Nah, what happened?"
"He got Denise & Sherrie pregnant at the same time."
"Ah ha! That nigga havin' 'Project Twins!'"

Project Twins by Junie P February 23, 2009

Twinkie Defense 

A defense tactic which seeks to excuse someone's behavior by evading responsibility. In the actual case, the defense effectively blamed the actions of the defendant on too much sugar derived from eating Twinkies.

I am not buying into your Twinkie Defense.

Twinkie Defense by CDA gf November 9, 2009

Twinzy 

A twinzy is a person you are so much like, u can/arent related. Usually charateristics are very similar as in looks, acts, talks, walks, dresses,etc.

Brother: Mom! you and erin are twinzys
Me: What do you mean?
Mother: Like Mother like Daughter:)
Me: Dammit...

Twinzy by Fritzy:) August 24, 2011

Twincest 

Stuff you say "woah, that's sexy" to.

Woah, that twincest is sexy.

Twincest by Kat-chan February 1, 2008

Twinkies 

Twins; People who dress, act, talk the same, or just like the same things.

"You like unicorns too?? We're twinkies!!"

Twinkies by Twinkie#1 January 12, 2013

Twinkle Tits 

When an obese man has rather large man boobs that get so sweaty they twinkle in the sun light.

"Oh man, Brian should wipe his twinkle tits, he's blinding me!"

Twinkle Tits by Gunther Gumball February 22, 2008