A reflexive verb is used in sentences where the subject is doing an action that reflects back to him/her, not to someone or something else - in other words, a person is doing an action to themselves.
Por ejemplo: Me lavo.
We use the reflexive pronoun “me” before “lavo” when we want to say “I am washing myself”.
If we say “Lavo el coche”, this sentence means “I wash the car”. Since the car is receiving the action of being washed, we do not use a reflexive pronoun.
Otro ejemplo: Me cepillo los dientes
I brush my teeth (myself). Here, I am doing the action to myself, therefore we use the reflexive pronoun “me”.
If we say “Le cepillo los dientes a mi hija”, we do not use the reflexive pronoun “me” because I am washing my daughter’s teeth. Here I am not doing the action to myself.
One of the first things you learned how to say in Spanish is an example of a reflexive verb - can you remember what it is?

Por ejemplo: Click to find out the other way to say...

¡Sí! Tú lo sabes: Me llamo Irene. This is an example of the reflexive verb "llamarse"!
You already know how to conjugate verbs (change verbs to match different subjects). Now, all you have to do is use a reflexive pronoun in front of a reflexive verb.