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1.
When things are not Fantastic it's just Shamtastic
ie: Fake Enthusiasm for a "loved" job, or event/situation.
Boss "How's your day been so far Billy?"
Worker "Just Shamtastic, totally stuffed!"

"how was the family reunion?"
"Just shamtastic, it was so boring!"
by Samson Dunn May 19, 2007
 
2.
When things are not Fantastic it's just Shamtastic
ie: Fake Enthusiasm for a "loved" job, or event/situation.
Boss "How's your day been so far Billy?"
Worker "Just Shamtastic, totally stuffed!"

"how was the family reunion?"
"Just shamtastic, it was so boring!"
by Samson Dunn May 19, 2007