senior sixteen 

when you gain no or even lose weight your freshman year, only to gain it all back and then some you senior year.

Because I was an athlete freshman year of college i lost 9 pounds, but by my last year i quit the team and gained the senior sixteen.

senior sixteen by sosaysi October 9, 2009

sweet sixteen

A time in a young girl or boy's life when he or she turns sixteen years old. Usually, the young person invites his friends over and then gets tanked.

Hey remember Mary's sweet sixteen? We got so drunk...

sweet sixteen by Aimee January 1, 2004

Sixteen

The age when everything you've already been doing becomes legit.

Mum/dad/other "funny adult" - Happy sixteen 'th birthday! you can finally have sex/drink alcohol etc...
you- yeah...finally...

Sixteen by Pixie101 July 28, 2010

sixteenth 

A Sixteenth is ONE-HALF of and EIGHTH of weed.

-Originated from Long Beach cerca 2005

-"Hey bra.. you want to go halves on an eighth!"

-"Yea and by half of an eigth do you mean a SIXTEENTH!"

-"For Sure..my man!"

sixteenth by Reefers42090804 February 10, 2009

sixteen candles syndrome

its a play on words from the movie "sixteen candles." when an unattractive girl tries to get the a guy that is not on her level, 3-4 levels above hers.

hey man, that ashley girl won't leave me alone. damn man, she got that sixteen candles syndrome!!!

sixteen candles syndrome by HawafricanMan June 22, 2009

Sixteensome 

It’s like a threesome but between sixteen different people

Want to come over tonight? I’m hosting a sixteensome!

Sixteensome by I love ass November 2, 2020

Sixteen Ninety

A woman that dresses in trendy clothes and usually has long hair and trendy shoes. You take a glance at her from behind and she looks about sixteen,but as she turns around and you see her face, you realize she's hideous and wrinkled and more like ninety.

" She's cute!, oh darn she's a sixteen ninety" 16/90

Sixteen Ninety by bobby-bover September 27, 2013