1. used to emphasize that something is remarkable, impressive, or extreme in quality
Usage: informal; contraction of 'hell of a'; common in spoken English and casual writing

1. used to emphasize the degree or extent of something; very or extremely
Usage: informal; contraction of 'hell of a'; modifies adjectives and adverbs

Examples

• That was a helluva game—I've never seen anything like it.
• She's a helluva talented musician.
• He did a helluva job fixing the car.
• It's helluva hot outside today.
• That's a helluva way to treat a friend.
• We had a helluva time at the concert.