I Thought That Was

Everything About Fiction You Never Wanted to Know.

"It's anything but."
—Tagline of Regular Show

A form of I Thought It Meant, this is when the title of a work is likely to confuse you in a similar manner, particularly if it seems like the name of a trope instead (because some do share names).

Not to be confused with I Read That As. Or I Thought It Meant.

So, to clear things up