Either the work or [[AudienceReactions the audience]] plays up something in the work as something it's clearly not (mostly).
In the show, it's often PlayedForLaughs (see DoesThisRemindYouOfAnything), RuleOfCool, or the writers just having fun. When it's the viewers, it can be FanDumb, or it can be them legitimately assuming something if the show unintentionally makes the thing look like the trope.
* WhatDoYouMeanItsNotDidactic (something to analyze)
* WhatDoYouMeanItsNotForKids (family friendly)
** WhatDoYouMeanItsForKids (for adults)
* WhatDoYouMeanItsNotPolitical (having political tones)
* WhatDoYouMeanItWasntMadeOnDrugs (made while high)
* WhatDoYouMeanItsNotForLittleGirls ([[ExactlyWhatItSaysOnTheTin aimed at little girls]])