Meaning of “so-called” - Learner’s Dictionary

so-called

adjective [ always before noun ] uk us /ˌsəʊˈkɔːld/

B2 used to show that you think a word that is used to describe someone or something is wrong:

My so-called friend has stolen my girlfriend.

(Definition of “so-called” from the Cambridge Learner’s Dictionary © Cambridge University Press)