Wiktionary
a. truthful, honest, serious alt. truthful, honest, serious
Usage examples of "straight-up".
Gryntaro was the epitome of the rough-and-tumble, no-nonsense type of Qanska, the sort who would be instantly and unanimously put in charge if the Counselors and Leaders and Wise ever decided to organize an army and take on the Vuuka in a straight-up battle.
Brighton Best Savings wearing a predesignated necktie at straight-up five.
Designed with the old straight-up and-down bow, the mahogany-trimmed yacht displaces one hundred tons and measures one hundred ten feet in length with a beam of twenty feet.
They'll leave the Sand Bar when the hands on the Kingsland clock stand at straight-up noon, no sooner.
The details would mean more to Daniel than they did to her, but it would be obvious to a child that a straight-up slugging match between a cruiser and a corvette with only half her normal twenty missiles could end only one way.