A superlative form of the adjective awful(adjective)
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Use "god-awful" in a sentence
"The actors who have played the Doctor have carried the series for years through god-awful special effects and at times ludicrous stories and Christopher Eccleston immediately takes charge of the role and puts his own stamp on the character."
"I originally borrowed it from the library, but when I realized how god-awful long the thing was, I decided I needed to go ahead and buy it."
"That said, the only way to lower the employer/County cost is to either switch everyone to god-awful plans, or to do some sort of premium share."