Under Proofed

-Hot girl who probably isn't 18 yet; jailbait
-hot girl but got no ass or tits

Reference: bakers refer to bread that hasn't fully risen adequately before it is ready to be baked as "under proofed"

That girly is hot, but looks under proofed, prolly should give that some more floor time before askin her out

Under the Car

A phrase commonly used to refer to someone who is hungry, tired or ill. Can be used to describe general mental or physical discomfort. Much like it's closely related counterpart "under the weather".

First usage took place in early 17th century England. During the Black Plague many people would be referred to as "under the buggy" or "under the horse". Evolving to present day we now use the more present term "car".

Etymology: Under, from the German word Unter or Untersglagen literally meaning the physical presence of one being underneath another object. The, from the Japanese word ザ or やその他のためにと literally meaning having the resemblance of a preword or explanatory vowel. Car, from the Catalan word cotxe meaning a form of motorized transportation.

- I don't know if I can work out today, I'm under the car.

- I'm under the car, I could really use a steak right now.

Under-treated

Being treated like a lame, not being shown the love you deserve

My girlfriend said she was feeling under-treated

Double Under

When a single person is displaying both underboob and underbutt.

All eyes were on her when she walked into the club with the double under.

Under the can

To stealthily pass a baggie of drugs to your friend, especially cocaine.

Barry: "under the can, jimmy"
Jimmy: "sound"

under-tempratured

The Nordic way to stating 'cold' or 'cool' in the sense that you might freeze someone simply by touching their exposed flesh.

David cools Nex down with his Nordic under-tempratured yet furry body.

Under The Roses

A phrase that essentially means “what happens in here, stays in here”.

“What we say here stays under the roses”