two-timer

Noun
  1. Someone who deceives a lover or spouse by carrying on a sexual relationship with somebody else (synset 110754398)
    is a type of: beguiler, cheat, cheater, deceiver, slicker, trickster - someone who leads you to believe something that is not true
  2. A person who says one thing and does another (synset 110047315)
    is a type of: beguiler, cheat, cheater, deceiver, slicker, trickster - someone who leads you to believe something that is not true
    subtypes: judas - someone who betrays under the guise of friendship
    same as: betrayer, double-crosser, double-dealer, traitor

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