Reflexive verbs are verbs which require an object, usually a pronoun object (myself, yourself, himself etc.).
In French there is no verb "to get", therefore you can’t say "I get washed". Instead you must think about who is being washed and so you must say "I wash myself". The words for "myself", "yourself" etc. are pronoun objects and as such must go before the verb in French.
e.g. Je me lave I get washed (I wash myself)
Tu te laves You get washed (you wash yourself)
Il/elle se lave He/She gets washed (he washes himself)
Nous nous lavons We get washed (we wash ourselves)
Vous vous lavez You get washed (you wash yourself)
Ils/elles se lavent They get washed (they wash themselves)
You must remember to add the correct ending to go with the person as usual, but you must also remember to put the correct reflexive or pronoun object before the verb (this must also agree with the person).
In the infinitive form (to be found in the dictionary) there will be a "se" before the infinitive form of the verb. Here this means "oneself".
Common reflexive verbs
se lever to get up s’ennuyer to be bored
se réveiller to wake up se coucher to go to bed
se détendre to relax s’habiller to get dressed
se fâcher to get angry s’endormir to fall asleep