adjective/ɛ.ma.blə kɔ.m‿yn pɔʁ.t(ə) də pʁi.zɔ̃/
aimable comme une porte de prison is masculine or feminine depending on context in French.
very unpleasant, like a bear with a sore head
Synonyms: antipathique, désagréable
Antonyms: sympathique, affable
Literally, “as pleasant as a prison door”.