Up in the Piece 

To be situated in or upon a particular destitation or area, usually a confined space with specific connotations.

Also may be used to indicate/intimate body-size or surface area of a person.

Is there carrot cake up in this piece?

Her big ass was all up in the piece

Up in the Piece by VirginiaP4 April 7, 2009

up in the air 

adj. Something which is tentative, iffy, uncertain, unresolved, or otherwise not definitive. An unsettled matter.

After George had that cold, the trip to the opera was completely up in the air.

up in the air by united spammers January 13, 2011

up in the night 

This is a saying used for someone who doesn't know what they are talking about. When someones is "up in the night", they may be confused, or making up facts, or just simply crazy.

Similar Sayings: "Off your rocker", "Out of your mind", "Crazy", "Far fetched"

When someone says something that is absolutely ridiculous and does not make sense, you respond with:

"Oh, you're up in the night!"

Or you can refer to someone else:
Mary: "Jane said it was snowing last night... it was 72 Degrees Out"
Molly: "She's got to be up in the night."

up in the night by wdyc1199 November 15, 2013

Up in the grillz! 

To have a foreign object or other obstruction in the way of personal space. It can also be used to describe an intrusion or some interruption.

"Yo, homie what you be doin' getting all up in my grillz!?"

"Hey Clarence check out those wasps all up in the grillz!"

Up in the grillz! by MP21 September 26, 2009

Up in the heavens

to be high

I was up in the heavens all day.

Up in the heavens by justino May 7, 2012

up in the nation

Severely cool; something epitomizing coolness.

Jane: Ben Folds is SO up in the nation!

up in the nation by Ander Fish Scales November 26, 2007

up in the night 

a phrase originating in Utah from the Pulsipher clan to describe someone who has crazy thoughts or ideas.

Josiah: hey, maybe our religion isn't the only one. Maybe we should learn about other religions....

Moroni: I think you are up in the night

up in the night by Kayzee_utah July 9, 2017