Simple past tense and past participle of sham.(verb)
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Use "shammed" in a sentence
"Having invested so much in worthless paper, rather than actual investments that stimulate economies, we have a poor economy coupled with a finance system that has shammed itself to death."
"I'm sure you can recall being shammed into throwing away $10 for a bad movie at some point in your life."
"Rather than have otherwise qualified aspirants tilt at windmills or be shammed with cosmetic social changes, it's seems fair and reasonable to implement mechanisms to compensate for intractable bias."