Movies
Boy, you must really think I'm stupid or something.
— Sandy · Tootsie
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker challenges an apparent assumption that they can be fooled or underestimated. The word 'really' presses the accusation, while 'or something' leaves it loosely phrased. Read as exasperation, the question objects as much to being treated as foolish as to whatever prompted it.
Context reviewed