straight up 

Means you are being very serious. no joking here.

john-i slept with her last night

mike- no you didnt

john- no dude straight up i did.

straight up by caddaayy April 5, 2009

straight up 

NO lies, Honesty, Truthfulness, No B.S., The Real Deal, Word up, etc...

Paula Abdul said it better than I could with the chorus : "Straight up now tell me,
Do you really want to love me forever? Oh, oh, oh...
Or, am I caught in a hit and run?
Straight up now tell me,
Is it gonna be you and me together? Oh, oh, oh...
Are you just having fun?"

straight up by J.Pardner August 4, 2007

straight up 

without ice (used when describing drinks)

id like a margarita please.. straight up, no salt

straight up by amanda February 12, 2005

Straight Up 

Synonym of the popular phrases: "Fax", "No Cap", "I'm not even trolling" and, "Deadass"

"Straight up bro, shawty's booty was astronomically phat!"

Straight Up by trendSetter6969 December 14, 2021

Straight Up 

Pure, absolute, sh*t like that.

Vanilla Straight Up: No sprinkles, toppings, mixes, just vanilla.

Straight Up by Zach G. August 28, 2004

Straight Up 

1. without stipulations or additions; outright.

2. indicating real talk; honesty.

3. a method of preparing a drink by straining the ice out after shaking or stirring it.
----

1. "I bought that cell phone straight up, without a plan."

2. "That game of laser tag was straight up GANGSTA!"

3. "Appletini, straight up."

Straight Up by johngodler69 October 21, 2011

straight up 

something that is cool or good.

you got some pussy yesterday, thats straight up

straight up by jon galasso August 18, 2003