A/one hell of a… Definition 1 of 2Pro Tip 1/3Emotional Intensity The phrase adds strong emotion, like excitement, admiration, or frustration. That match was one hell of an intense game! Pro Tip 2/3Colloquial Usage Use it in informal conversations rather than formal or written English. She threw one hell of a party last night. Pro Tip 3/3Positive or Negative It can be used to describe both very good and very bad situations. He's in one hell of a predicament now.