1) Cads 2) Varlets 1) Dastardly dudes 2) Dastardly fellows 3) French deck card game 4) Jacks 5) Jacks in a deck 6) Jacks in decks 7) Jacks, to some 8) Rascally sorts 9) Rascals 10) Scalawags 11) Scoundrels 12) Three-player card game 13) Trick-taking card game 14) Tricky fellows 15) Unprincipled fellows 16) Untrustworthy types 
the jacks in a deck of cards. Pip calls the knaves "jacks" in Great Expectations and is scoffed at by Estella.