a háta mögött

a (“the”) +‎ hát (“back”) +‎ -a (“his/her/its”, possessive suffix) +‎ mögött (“behind”), literally “behind one’s back”

• IPA^(key): [ɒ ˈhaːtɒ ˈmøɡøtː]

a háta mögött

1. (idiomatic) behind someone's back (when someone is not present)[1]

   A munkatársam szemben hízeleg a főnöknek, de a háta mögött gúnyt űz belőle. ― My coworker is nice to the boss when he’s here, but makes fun of him when he’s not present.

2. (idiomatic) behind someone's back (without somebody's knowledge, deliberately leaving someone out)[1]

   Kati háta mögött eladták mindenét. ― They’ve sold all Kati’s property behind her back.

• The noun hát (“back”) takes the appropriate possessive suffix according to the subject of the sentence: hátam (“my back”), hátad (“your back”, singular), háta (“his/her/its back”), hátunk (“our back”), hátatok (“your back”, plural), hátuk (“their back”).
• The postposition mögött remains unchanged.

• az isten háta mögött