ils se prennent

who do they think they are

→ il
phrase Rare #23,130
who do they think they are Used to criticize people acting arrogant, entitled, or as if they are more important than they are. It often appears in the question « Pour qui ils se prennent ? » and in the phrase « se prendre pour ».
FR: Mais pour qui ils se prennent, ceux-là ?
EN: But who do they think they are, those guys?

Pour qui ils se prennent?

Who do they think they are?

Ils se prennent trop au sérieux.

They take themselves too seriously.

Ils se prennent beaucoup trop au sérieux.

They take themselves way too seriously.

Les anges peuvent voler parce qu'ils se prennent à la légère.

Angels can fly because they take themselves lightly.

Ils se prennent pour des bandits.

They think they're gangsters.

— Gangs of Wasseypur : 1ère partie (2012)

Ils se prennent pour qui?

Who do they think they are?

Mais pour qui ils se prennent?

Who do they think they are?

— Star Trek II : La colère de Khan (1982)