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intr.v. phi·lan·dered, phi·lan·der·ing, phi·lan·ders
1. To have a sexual affair with someone who is not one's spouse or partner. Used especially of a man.
2. To have many casual sexual affairs. Used especially of a man.
3. Archaic To flirt. Used especially of a man.
[From philander, lover, from Philander, former literary name for a lover, from Greek philandros, loving or fond of men : phil-, philo-, philo- + anēr, andr-, man; see ner- in Indo-European roots.]