cheat on

Definitions of cheat on
  1. verb
    be sexually unfaithful to one's partner in marriage
    synonyms: betray, cheat, cuckold, wander
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    carry on a romantic relationship with two people at the same time
    fool around, play around
    commit adultery
    type of:
    cozen, deceive, delude, lead on
    be false to; be dishonest with
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