when Roman and Marlena first got together. Chris was with Kayla during that time. He was more the "cowboy" type guy so his "What da *ell" fit with the character. Roman was/is and Irish Midwestern guy so that phrase sounds silly to me. Roman was never from Texas unlike JT, I’d rather have had him using an Irish brogue, it would make more sense for the character.
BTW, I don’t dislike Josh Taylor, I just don’t like him in the role of Roman and when the real Roman came back the second time, I lost interest in him with Marlena as she had way more chemistry with John by then.