Sizey 

To describe someone that is fat or large in a nicer way.

That lady over there is very sizey.

Sizey by Jonno15 February 10, 2021

Dysfunctional family size 

A level of measurement, in this case it denotes one 1.75 L bottle of hard alcohol.

You're guaranteed to find at least one of these hidden in every white, suburban pantry. Their main purpose is to sedate soccer moms and allow their underage kids to get shit housed and try to play tennis with the cat.

Man, last night was boring as hell until Mark found his mom's dysfunctional family sized bottle of Cuervo. Next thing I know we turned his living room into a slip n' slide and Ashley puked in the china cabinet.

Dysfunctional family size by Elwood Lane November 4, 2012

Size Kink 

Being turned on/aroused at a distinct difference in size in comparison to your partner. Usually includes height, muscle size, penis size, and weight. It is generally used when referring to a submissive being turned on at being smaller than their partner, but goes both ways. (being turned on at your partner being smaller than you.)

Ugh, I've got a total size kink; I just go weak in the knees when he wraps his huge hands around my neck!

Size Kink by sams winchesters July 15, 2018

of size 

The euphemism for a large or obese person. Soon to be adopted by airlines who have to be careful not to overfill their flights.

"Oh man. Last week, I had to sit in a middle seat between two people of size. It was not pretty."

of size by Moggraider February 19, 2010

Adjusted Penis Size 

From the SouthPark episode TMI. According to Randy Marsh, you can calculate your Adjusted Penis Size (or TMI) with the following formula:
((L*D)+(W/G))/(A^2)
Length times Diameter plus Weight over Girth divided by Angle of the tip squared

Randy Marsh has a penis that is 4.4 inches in length. Its angle is 32 degrees. It's flaccid girth is 1 inch in diameter. His balls are 7 cm from the base. Randy notes that the drift of his penis is 4 cm to penis right and its dead weight is 4.5 Kg. Therefore, Randy's adjusted penis size is 6.3 inches.

Adjusted Penis Size by Ingrid Cole June 21, 2011

American Sized 

Since America is the most obese country, then anything huge would be considered American Sized. To include women, big SUVs, value meals, etc.

At the mall
Me: Ugh! Check out tubs over there!
You: Dude she's huge!
Me: Nah, she's just American Sized.

At the fast food restaurant
Cashier: Med or Large?
Me: American Sized!

American Sized by Chaimberlainiii July 20, 2010

Sizzy 

"Sizzy" is the ship name between characters Simon Lewis and Isabelle Lightwood in The Mortal Instruments series by Cassandra Clare.

Person: I don't ship Sizzy, Simon and Isabelle aren't right for eachother.
Entrie Fandom: WHAT DID YOU JUST SAY

Sizzy by Clary Herondale July 25, 2016