schlenter
adjective
[ ˈʃlɛntə ]
• not genuine; counterfeit.
• "boys learn to tell the difference between genuine and schlenter diamonds"
schlenter
noun
• a fake diamond.
schlenter
verb
• achieve or acquire by underhand means.
• "I can always manage to schlenter a car"
Origin:
from Dutch and Afrikaans slenter ‘trick’. The sch- probably reflects Yiddish influence in the 19th century in diamond mining.