One hell of a (something or someone) impolite phrase spoken informal
The noun "heck" can be substituted for the noun "hell".
Used to emphasize that someone/something is extremely good, nice, exciting,...
We have listened to one hell of a beautiful song.
She expected to date with one hell of a handsome guy.
Used to emphasize that someone/something is extremely bad, terrible, difficult,...
It's one hell of a long way to the nearest bus station.
He was selfish and jealousy, totally one hell of a badass.
To talk the main part at once, or avoid talking about what is not important
You should get straight to the point.