Straight up 

1. Actually.

2. In all honesty, seriously.

3. Honest.

1. That guy straight up just took off his clothes in public.

2. Straight up, I'm not playing with you.

3. If he asks you where you were, be straight up, don't lie about it.

Straight up by Some Guy 88 March 9, 2019

Straight up 

To do something honestly, definitely, exactly, or without making a mistake.
It is often said for emphasis

Guy 1: Dude, I straight up banged your mom last night!
Guy 2: Not cool man.

Straight up by Tarboy9 August 18, 2015

straight up 

To be right or for real

Person: That is the coolest thing ever.

Person 2: Straight up.

straight up by Tazzaler October 19, 2005

straight up 

being honest, telling the truth

When he told me about what he had done, I was surprised! I asked him "Straight up?" and he said "Yeah, honest!"

straight up by Pro-Love Girl May 2, 2010

straight up 

like the straight arrow, flying forward towards its target, straight up gets straight to the point. No bullshit, I am telling you exactly what I mean.

We should go to a movie straight up.
Dude straight up, lets do this.

straight up by Andrew Shea August 23, 2004

straight up 

absolutely, totally

straight up gangsta

straight up by JTYRHE June 4, 2004

straight up 

to be honest, to not lie, to not hide things behind other's backs. An abbreviation of the term straight up is SU.

Dude just be straight up.

Dude, Jane gave head to greg behind my back, thats not straight up.

straight up by Collotta January 15, 2007