Bulgarian-English translations for измамник

• cheat
  My brother flunked biology because he cheated on his mid-term.
  My husband cheated on me with his secretary.
  After he found out his wife cheated, he left her.
• fraud
• gyp
  Why do we have to buy this new edition of the textbook when there’s almost no difference between it and the previous one? What a gyp!
  The cab driver gypped me out of ten bucks by taking the longer route.
  You better watch out; theyll try to gyp you if you dont know what youre doing.
• humbug
• impostor