adjective, adverb Pronunciation Spelling.
Examples from the Web for heckuva
"It's just a heckuva lot of fun," said David Seay, who has lived in Avoca since 1990.
No one wants to be the next Ray Nagin or Heckuva Job Brownie, looking disorganized after Katrina.
In what might just become their “Brownie, you're doing a heckuva job!”
What all this Sturm und Drang has guaranteed, is that this will be one heckuva commencement speech to watch.