ADJ （表示强调）极好的，极坏的，庞大的 Some people say a helluva or one helluva to emphasize that something is very good, very bad, or very big. （表示强调）极好的，极坏的，庞大的 [informal, emphasis]
It taught me a helluva lot about myself.
这让我对自己了解了很多。
The man did one helluva job getting it all together.