Tropes
A trope is a convention or device that establishes a predictable or stereotypical representation of a character, setting, or scenario in a creative work. TVtropes provides a list of indexes for various types of tropes.
ex.
https://tvtropes.org/pmwiki/pmwiki.php/Literature/GoodnightGoon
Memes
A meme is a cultural item in the form of an image, video, phrase, etc., that is spread via the internet and often altered in a creative or humorous way. Know Your Meme is a site that researches and documents Internet memes and viral phenomena.
ex.
https://knowyourmeme.com/memes/people/bob-ross