Plot-full

also known as 'Plot!', '!Plot' or 'plotty' it means that it is a story with a deep and well thought out plot. Commonly used on fanfiction.net in a fanfiction

Lizzy: Have you read 'The Charlemagne Pursuit'?
Chris: Not yet...
Lizzy: Well you should, that book is really plot-full.
Chris: you mean it's plotty?
Lizzy: Definitely!