straight-up

From Middle English streight up (“straight, erect, not curved or crooked, direct, honest”), equivalent to straight +‎ up.

straight-up (not comparable)

1. (colloquial) True; unambiguous; unqualified; plainly so, with no bones about it.

   From her recent comments, I think she's a straight-up racist.

   • 2012 May 21, Robert McMillan, “How Apple and Microsoft Armed 4,000 Patent Warheads”, in Wired:

     Because it doesn’t actually produce anything, some knock Rockstar as a straight-up patent troll.

2. Of an alcoholic drink: served straight up.

   I'm going to go get a straight-up cocktail.

straight-up (not comparable)

1. Alternative form of straight up