Definition of straight up in English:

straight up

phrase

informal
  • 1British Truthfully; honestly.

    ‘come on, Bert, I won't hurt you—straight up’
    • ‘Straight up, I didn't laugh once during this entire flick!’
    • ‘She had asked him straight up if there was anything going on between the two co-stars and he denied it.’
    • ‘Well, I guess you should just tell them straight up that you're gay and that you don't (and will never) find them attractive.’
    • ‘Well, let me tell you straight up: I've never changed my mind about the war.’
  • 2North American Unmixed; unadulterated.

    ‘a dry martini served straight up’
    • ‘This is a vodka to be drunk straight up, and one that is good for the martini drinker.’
    undiluted, neat, unmixed, unadulterated, pure, unblended, uncut
    View synonyms

Pronunciation:

straight up

/ˌstreɪtˈʌp/