straight-up
adjective - (or adv) Honest; upright; straight arrow: They were straight-up, nice people/ doesn't believe the women's product can compete with men's volleyball, not straight up, not on the basis of skills or popularity (1910+)
- Of cocktails, served without ice cubes; neat (1975+)
- Of eggs, sunny side up
[straight-up-and-down in the first sense is found by 1903]