helluva
adv. C1 Advanced US //ˌhɛˈɫuvə// UK //hˈɛləvɐ// hel·lu·va
adv. a very great amount of something. You use this when you want to say something is extremely good or bad in a casual way.
adv. an extremely large amount or degree of something.
That was a helluva party last night.
The team put in a helluva effort during the final minutes of the game to secure the victory.
After a helluva long journey across the continent, the travelers were finally ready to rest and enjoy the local cuisine.
Written form of a reduction (relaxed pronunciation) of hell of a.