Shammosim is not a common word in English. Did you mean 'sham'? 'Sham' means something that is not real or true.
Sham can make people think of lies or fake things.
Examples:
The jewelry was a sham; it wasn't real gold.
She tried to sham being sick so she wouldn't have to go to school.
He was caught in a sham and had to tell the truth.
The cake was a sham; it was made of plastic!
The king's crown was a sham; it was just a toy crown from the store.
He tried to sham being a superhero, but everyone knew it was just a game.