to heck a whole lot busier

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi,
I’ve just stumbled upon “It’s going to heck a whole lot busier than this…”

‘To heck’ not a verb surely? ‘Damn busy’? What else?..

2

That doesn’t make sense,

This does:
It’s going to become a heck of a whole lot busier than this.