(adjective) Extremely bad, displeasing or offensive to one or more of the senses. Not only bad, but singularly bad to the point where it is estimated to be the very worst of its kind.
The crime scene was a gawdawful spectacle he'll never forget.
My housemaid has no sense of smell... which is good, because she is spared the gawdawful odors that my house sometimes harbors.
Melvin Van Peebles's SWEET SWEETBACK'S BAADAAASSS SONG is a gawdawful mishmash of ideas and tones.
John's first attempt at preparing Indian food simply yielded a gawdawful mess that he ended up feeding to the dog.
Shi'gadam is a contraction of the words 'shit' and 'God damn'. It can be used to express frustration, anger, confusion, or elation, making it a versatile companion for tomfoolery.
Background origin is likely a Franco American patois
Patrick discovers that traffic is backed up and will make him late, he says "Shi'gadam!"