1) Reflexive verbs are verbs where the subject performs and receives the action, like "lavarse" (to wash oneself). 2) Reflexive verbs end in "-se" in Spanish and require a reflexive pronoun like "me", "te", or "se" that matches the subject. 3) Examples of using the reflexive verb "lavarse" include "lavarse las manos" (to wash one's hands) and "lavarse el pelo" (to wash one's hair).